Weather Pain

The wand puts a single homing tornado on the field and leaves it there. It picks its own target, parks in front of whatever it finds, and grinds away without any further input. Firing again does not stack a second one, it replaces the one you had, so mashing the button is wasted mana.

Treat it as background damage rather than your main weapon. Cast it at the start of a fight, then switch to something you actually aim while it works on its own. It also chews through a slice of enemy armor, which is worth more at this stage of the game than the raw numbers suggest.

The tornado retires once it has landed enough hits, so a swarm burns it out in seconds. Its best work is on one tough enemy that stays in front of you, which makes Deerclops himself and the early Hardmode bosses good customers.