Bunny Hood

Only the evil versions of bunnies carry this, which means you need a Blood Moon, since that is what flips ordinary bunnies into their corrupt or crimson form. The efficient method is to catch bunnies with a bug net during the day, stash them in a chest, then dump the whole stack out at the start of the next Blood Moon and cut through them. A Bunny Statue does the same job on a timer if you have found one.

The drop chance is low enough that one night is unlikely to be enough, but bunnies die to anything you are carrying, so a second attempt costs you nothing but the setup. It is pure vanity, so chase it only if you want the look.