Thanks you guys!! I found it!! Now to stock up on Unicorn Blood because my gosh... he's worse than Scammer. Love the irony of his whole character arc tho!! (Also, are unicorn tears meant to revive the target with 1 hp? the description says half, but they always revive with one)
Also, there's a secret gimmick to that OP boss that can make the fight really easy. There's a bit of RNG involved tho. I wonder if anybody already found it out.
Unicorn tears are supposed to revive you with 50% health. I just messed up when making the item, so my bad. It's gonna be fixed in the next patch, which should come out later today.