CJAC07, Assassin Companion

Partner with Amaryllis, Spectral Alchemist.

Attack Protocol — Whenever you attack,
CJAC07, Assassin Companion gains a +1/+1 counter.

Defense Protocol — Whenever Amaryllis, Spectral Alchemist would die, you may pay
{2}{u} and instead sacrifice CJAC07, Assassin Companion. Return it to the battlefield at the beginning of your next end step with a stun counter on it.