Atrax, Dishonorably Discharged

Partner with Crater, Capricious Cohort

When Atrax enters, target creature gains +X/+X
and menace until end of turn. If that creature deals
no combat damage this turn, sacrifice it.

{1}{b}, {t}: Return Atrax to it's owner's hand. activate only if a spell or ability is targeting Atrax