Let's play Ocarina of Time

The Depths

The room was squarish, and dark. It had earthen walls and a high ceiling. There was a pair of Deku babas growing in the floor- the nearest one lunging at Link as he watched, but coming nowhere near to hitting him. Behind the nearest Deku baba was a lit torch on a stone plinth. There was also a pair of unlit torches off to Link's right, flanking either side of a barred door. 
nbndnt: Can we take the one torch that is lit and use it to light the other two?
ZetaThetaBeta: You can't move the lit torch...
nbndnt: Do we have some stick to burn?
ZetaThetaBeta: I honestly don't remember. We could check your inventory and I'll leave it up to chance, or if you remember where Deku sticks come from...
nbndnt: The sticks, they come from Deku babba? So we'll hit the Deku baba first and then use the stick to light the two torches.
ZetaThetaBeta: Excellent!

Attacking the Deku baba was becoming routine by this point. Link still had to be careful to time his movements in between lunges of the monstrous plant, but with a lash of the Kokiri sword, the Deku baba flexed backward and up, fleeing the sword but allowing for another slash to cut through its stem, killing it.

Within a few minutes, Link was using the stick produced by killing the Deku baba as a candle to travel between torches, lighting them all. Once all the torches were lit, Link heard the sliding sound of metal on earth as both doors were quickly unbarred, allowing him to press on.

With a feeling that he might finally be close to breaking the curse that was harming the Deku tree, Link entered the next room to find the earthen walls nearly devoid of roots. The walls themselves seeming to be halfway between earth and bedrock. A single torch lit the center of this circular chamber, but- looking up at the ceiling revealed a large Skulltua blocking his advance.
ZetathetaBeta: So what's the plan with the spider?
nbndnt: Go for it's stomach and kill it!
ZetaThetaBeta: Gotcha.

Truly feeling like a veteran now, Link was able to dispatch the giant spider quickly enough with his slingshot and the short, but reliable, Kokiri sword. It was then that Link noticed another feature of the room: behind the spider, on the ceiling, were three large pink... sacks? Each one was roughly the size of Link himself and while they pulsed slightly as if something were moving from within, they did not appear to change or react in any way to the death of the spider, who (Link realized) has blocked a fair of tunnels exiting this chamber with a thick sheet of webbing.
nbndnt: Are those sacks hanging? Or sticking to the ceiling?
ZetaThetaBeta: Sticking, but only by their upper most part.
nbndnt: Hm. Could they be perforated by the slingshot?

Curious of the sacks and their strange undulations, Link pulled out his slingshot and took aim at the nearest one. Shooting it without ceremony and watching as the sack exploded and then disintegrated. 
ZetaThetaBeta: Two more sacks remain. Keep shooting?

nbndnt: Is my ammo limited?

ZetaThetaBeta: It is, but seeds can be found but cutting grass and bushes which grow in a lot of these chambers
nbndnt: I will try to shoot the other two, too.

Encouraged that nothing bad was happening, Link destroyed the second pulsating bag as well. The final bag proved to be at a difficult angle for him to hit from his position by the dead spider, however.
ndndnt: Can we move a little closer, deeper into the room and try to shoot from there?

Link stepped closer into the vaguely circular room, intending to position himself next to the lit torch on the floor before shooting again but the sack did not give him that chance. With a wet, slick popping sound it detached itself from the wall and crashed onto the floor, splitting open to reveal that it had not been a simple sack or blob, but a gelatinous, rapidly developing egg. The creature that leapt forth was unlike anything link had ever seen before: it ran forward on a pair of insect like legs as quickly as a person and gazed at him with one giant, green, malevolent eye. Navi, ever helpful, identified the hostile arthropod as a 'Ghoma larva' in Link's ear as he readied himself to meet this new threat.  
ndndnt: Can we kill it?!?
ZetaThetaBeta: We'd better! So how do you propose to deal with this thing?
ndnbnt: Can we hit the Ghoma larva in the eye?

With very little time to raise his shield, Link swung the Kokiri sword directly at the creature, catching it across the midsection and wounding the opaque, green eye. With a sickening, inhuman posture, the creature staggered back and, then crouched. It raised what looked like a sting over its head and its eye and body flushed red before it leaped at Link. Pouncing as if it meant to pin him to the ground.
ndnbnt: Oh my! Let's run and then shoot him with the slingshot in the eye.

Link turned and fled, trying to keep the torch between him and the Ghoma larva while reaching for his sling shot. His plan was slightly altered however when a Deku baba lunged at him from the shadows and forced him to reposition. Eventually he was able to get the sling shot up and pointed at the creature, though his first shot missed.
With a deep breath the waited for the Ghoma to close the distance again before looing the Deku seed into it eye. The impact, sounding almost like a metallic clang, pushed the Ghoma larva back but did not damage it in any visible way, compared to the slash from his sword earlier.
ndnbnt: Can I try to jump around behind him and slice the thing on his head?

Link backed up and stowed his slingshot, intending to slash at the larva with his sword from behind. The creature, however, had other plans and leapt out of reach before readying another head long charge.
ndnbnt: Let's try a couple more swings.
This time Link was much more prepared and met the Ghoma larva with a vertical slash though the eye. The insect like creature gave an unearthly cry and pulled away with a ferocious jerk, coming apart as it twitched and died.
ZetaThetaBeta: So...
nbndnt: So we can burn webs now?

With no one left to attack him, a spare Deku stick from the previous room and the Deku babba unable to reach him, Link was able to catch his breath while using the torch to light his stick and burn the webbing away from two crude archways. The first produced a dead end, but the second archway led down a rough slope into a blank wall, the bottom of which was perforated by a single, tiny gap, small enough for a boy to cram himself into.
nbndnt: Let's go through the gap!
ZetaThetaBeta: That's the spirit.

Crouching on all fours, Link could see a light at the end of the narrow, claustrophobic tunnel and crammed himself into the space. After a few intense seconds of pushing and wriggling, he emerged on the other side and found himself in the main chamber that was directly under the tree: the pool of water that he originally fell into sat on his before him, at the bottom of a drop off that would have prevented him from arriving at this part of the chamber by any path other than the one he had just been though.

The rest of Link's surrounding felt familiar, albeit in a new configuration. There was another massive hole in the floor that was covered by a spider's webs, and torches mounted too high on the walls for him to be able to reach with his Deku stick. There was also a large, squarish block that sat on the edge of the drop off between this, higher, part of the chamber, and the lower part.
nbndnt: Hm I guess the block would be the thing that needs some investigation What kind of block? The one we can climb to?
ZetaThetaBeta: Yeah it can be climbed and/or pushed off the drop into the water below.
nbndnt: Can we first peek into the water.

Link walked over to the block and peered over the drop off. The fall was too high for him to climb back up, but not especially far compared to the giant leap he took to end up at in the roots of the tree. The water below- part of the same body of water he originally fell into- formed a shallow stream beneath him that separated his elevated position from a portion of dry land with a lit torch below the drop off.
nbndnt: Let's try to push the block into the water?

After a moment's hesitation, Link began pushing the heavy block- the only feature on his size of the water- towards the drop off. The block was only able to move in a shallow groove near the lip of the drop and with a mighty heave Link was able to cause it to teeter, and then fall into the shallow channel with a mighty splash. Panting, Link looked over his handiwork: the block now allowed him to climb between the upper part of the chamber, with the web covered hole in the floor, and the lower part of the chamber, its water features and its well-lit islands.
nbndnt: Can we move to the island?

With a hop, a stumble, and an eventual splash down into knee-deep water, Link dropped down onto the recently fallen block and crossed to the island - its familiar torch burning merrily.
nbndnt: Is there anything else on the island aside from the torch?
ZetaThetaBeta: Nope- you might remember that this was the island where you lit a stick on fire and used it to destroy a cobweb on the other side of the room.
nbndnt: Is there any web around right now?
ZetaThetaBeta: Not on the lower level but there is a big, web-covered hole in the floor

nbndnt: Can we burn it?

Thinking back to the hole in the floor on the other side of the water, Link lit a deku stick and carefully made his way through the icy water, up the block and finally onto the ledge. Coming to stand on the web-covered hole right as the flame on his stick was about to go out, Link had just enough time to see a well lit chamber, and a vine covered wall beneath him before he was forced to jab the smoldering wood onto the web.

With a hiss the webbing melted, sputtered, burned and failed all at once, causing Link to drop once again into a lower chamber. Despite experiencing the same thing earlier, Link was still not prepared for the plunge into icy cave water that waited him at the bottom.
nbndnt:But what do I see? Is it just water and walls around me?

The water in this, deepest section of the caves beneath the Deku tree proved to be very shallow: Link's toes brushed the hard, clay bottom of the pool as the looked around. Behind him, was a wall of vines that might have been useful for a climb back to the level above. Before him and slightly to his right, the pool of water gently shallowed until it met with the edge of a mossy, earthy floor. Three bushes that looked suspiciously like Deku scrubs rustled gently on the far side of the room: between them, a door blocked by iron bars loomed.