Nettle Burst

Each use throws out a long vine that snakes forward and then hangs there for a few seconds, grinding anything caught inside it. The important part is that walls do not stop it in either direction. Cut a one tile slot in a wall, stand behind solid ground, and you can kill things that have no way to reach you at all.

Worms are the standout, because the segments buried inside stone are still valid targets and the pierce has no ceiling. Anything with several hitboxes, or a screen full of summoned adds, feeds it the same way. Against one fast boss in an open arena it falls off hard: the vine is a fixed line, it does not follow anything, and a target that keeps moving spends most of the duration outside it.

It is the end of the line that starts with the Vilethorn and passes through the Crystal Vile Shard. Same idea each time, with more reach and more hits per cast.