Trial and Error

Whenever you cast an instant or sorcery, flip a coin. If you get heads, copy that spell. You may choose new targets for the copy. If you get tails, exile that spell and put a note counter on Trial and Error.
Whenever you make a coin flip with Trial and Error, you may remove a note counter and flip another coin. You must keep the new result.
"I could have sworn I added enough newt tail..."