Undertale One-shots : Why me ?

Gaster x Yandere beast reader part 3

You soon got accustomed to your new form , it had gotten colder and a layer of snow covered the land you now traveled . You'd found a lot has changed now that you are ... A beast , your hunger is almost always there , as well as a almost blood like lust. But I suppose that wouldn't be the right words to use , monsters or humans . At this point you didn't care , no one mattered , everyone you loved was dead , so you decided that if no one cared , then you wouldn't either . Killing seemed to come easy to you now , you flawlessly slayed a buck that was trekking through the snow now , it was like a second nature .

You were currently hunting , tracking down a rabbit , as small as it was , it had to do for the moment . You leapt from tree to tree easily , you landed on a branch above the rabbit you tracked , it hopped slowly through the snow , having not noticed you since you were deathly quiet. Your tail whipped out and quickly wrapped around the rabbit , you drew your tail back as well as the rabbit , drawing it to your now wide open jaws . Just as you were about to enjoy your meal , a scent wafted through the air ... Monsters it seemed , heh , how you've wanted to see their kind again . You examined the ground , the rabbit breathing heavily and squirming still in your grasp , you spotted a glint of something ahead , a distance away it seemed .

You quickly sat the rabbit back down and leapt quickly towards the glint , once you got closer , you saw it was monster soliders in armor . You smiled an unsettling grin once you saw this , your tail almost swishing in happiness of what was to come . They walked forward , not noticing your presence " I still c-cant believe that experiment went so wrong !" A familiar voice spoke , the frightened monster from the experiment .. ha more like ritual . You bit back a growl as you realized this " don't worry about it . Probably dead by now ." Another soldier spoke gruffly " yeah , it's the cold season now ." Another spoke , just a group of three..perfect.
The frightened one lagged behind , which gave you the chance to strike.

Your razor sharp tail shot out and wrapped around their neck , dragging them back towards you , your claws dug into the tree you gripped onto as you did so . You brought him up to face you , giving a deranged grin at him , his eyes widen as he choked out a whimper and clawed at your tail , only injuring himself in the process . You opened your jaws widely , your sharp teeth glinting in the early morning light , this was the last thing the frightened soilder saw . Your jaws snapped down around his neck , your excitement raising as you did so , you readied to consume your meal . But as you did so the once frightened monster solider turned to dust .

You whipped your tail , getting the dust off of it in disgust , to say you were disappointed was an understatement . You reluctantly swallowed the monster dust within your mouth . You expected it to go down horribly , but it really wasn't that bad at all . You licked your lips as you looked at the remaining clueless soldiers " we'd be able ta' seem em' anyway , so no need to go on about it ." The first soldier spoke .

After moment of silence , the first solider turned to see what was the hold up . His eyes widened as he saw the remaining dust off his deceased ally , he opened his mouth to yell out . But before he could , your tail impaled his chest through the armor with little difficulty , he burst into dust . The dust of the first solider coated the ground and the side of the second solider , who quickly let out a scream as he saw your dust covered tail retreat . You leapt off the tree and onto the ground with a wicked grin and growl " hello , remember me ?" You growled out , circling him as he trembled and held his useless spear to defend himself . The same spear used to kill your best friend .

You growled loudly at this " you will die painfully. " You hissed , lunging forward and smashing him to the ground . Your claws dug into his shoulders painfully as you hissed . His eyes widened in horror " W-Wait! Get off of me you crazy thing !" He yelled out before your teeth sunk into the side of his neck . This time , you injected him with a strange type of venom you've developed over your time of turning . This caused him to scream out , you backed up and licked your lips , loving his screams . You quickly ripped his chest plate open , removing his armor protecting his torso .

You looked up to him with a horrific dusty grin " dont worry ~ I won't let you turn to dust .... Oh no , your going to watch as I rip you apart !" You hissed in his face . You held his shoulders down as you lowered down upon the dog like monster , you could now see how he looked after removing his armor . You licked over his stomach , causing him to shiver and look at you terrified and disgusted . You suddenly used your tail to impale his stomach , just enough to get you started . You quickly began to feast upon him after you did this , eating your fill as you did so , making sure to make him die slowly and painfully as you did so .

You moved back after you were done , lifting off of the deceased monster and jumping back . You looked over him , his horrified eyes opened widely , still staring at we're you were before . Your licked your lips and chuckled " you'll turn to dust soon ... Heh , maybe ." You grunted . You moved back into the trees , and leapt through the trees once more , heading back to where you knew the monster camp resided . You made it to the edge of the camp , your keen eyes searching for a trace of ... That skeleton monster , Gaster .

You grit your teeth at the mere thought of him , which slowly shifted into a crazed grin . You spotted him heading out of a tent , he seemed angry . Good , you wanted him to suffer. You watched him a moment , he paced back and fourth around a table , checking that little notebook again and again . " At this point we're going to be drawn back ... If only the experiment had worked !" He growled out , slamming the notebook down and dragging a skeletal hand down his skull " what went wrong ...?" He muttered , pacing . Your grin lessened , before it returned full force , perhaps you could .. give him a gift .

With this thought , you quickly ran back to your prior meal , and dragged the limp monster body with you , making sure to put it inside of Gasters tent as he worked outside . You quickly raced back into the trees as it began to change into the later hours of the day . It took around three hours for Gaster to even return to his tent , though only to show a coworker something , the coworker excitingly ran ahead , opening the tent . A horrified scream followed , it didn't take long for a group to gather to look at the mind boggling scene . The dog monsters body soon burst into dust , the effects warring off .

It seems your little 'gift' had caught quite the attention , it even started a meeting . Which you found rather amusing , they hurt ... No killed your prior body , so why not get them back ?

~~~~ Time Skip ~~~~

You returned in the morning to drop off another gift , this time a severed buck's head , and the following days after we're similar , piles of monster dust to human arms and animal parts . The monster camp had gotten wary and irritable thanks to your gifts , Gaster had been convinced that the so called experiment was out to get him and right he was . The gifts continued for a long while , the battle between monsters and humans had gotten worse . You made sure any ill willing human that entered the forest near the camp was delt with , you didn't want your prey getting killed off so early after all. The fun had just begun .

It took another month for Gaster to fully snap , he decided he must face his fears , and his mistake , you ... So he stormed off in the night to search for you , armor on the ready to be attacked . You of course , we're ahead of him , a matter of fact , you lead him to your resting place , running ahead and leaving footprints in the cold winter snow for Gaster to follow , which , he of course followed .

It was only a matter of time before Gaster caught up. Mere minutes before you two finally meet , face to face for purhaps the last time

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We're reaching the end ! Tell me if you have any recommendations for me to add to this or for the ones to follow !