Airst

Airst is a miniboss that randomly appears in hardmode with the following message "The air is slowing down..."

Appearance
Despite Its name, It's literally air.

Phase 1
It will just chase the player, taking 3 hearts from the player.

Phase 2
It dashes fast, nearly impossible to dodge with the invisibility.

How to kill
It can't be killed with any weapons, it can only be killed with trees, if it runs into a tree, it will have 5 hearts taken from it

Health
30

Trivia

 * Its sprite is fully erased, reasoning why its called Airst
 * Its name is a combination of Air, and First.