Amongst the Cosmos/Corrupt Dryad

The Corrupt Dryad is a Pre-Hardmode meant to be fought before any bosses have been defeated.

Summoning
The Corrupt Dryad does not spawn on its own and only spawns if either 30 s or s have been defeated.

Behavior
The Corrupt Dryad will attack by throwing an. If below half health, it will throw a larger acorn, which deals more damage and splits into 4  Acorn Chunks upon hitting the ground, which also deal damage.