Here's one for you DM's that want a good old river fight.
The players have to get a cross somewhat deep river & there isn't a bridge in sight. If they decided to wade though the river to the other side they will be attacked by some monsters while going across. These monster can either be a creature that would live in the water (piranhas, water weird, hulking crab) or some marauding monsters (orcs, goblins, kobolds)
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Fanonomicon: Volume #2
FantasíaThe Second Instalment Of D&D Fan Made Concepts & Ideas! This One Features Ideas 201 - 400