Mamushik, Sewer Kingpin

Eminence -- At the beginning of combat on your turn, if Mamushik, Sewer Overlord is in the command zone or on the battlefield, another target creature you control with deathtouch gets +2/+0 and gains indestructible until end of turn.
Deathtouch
Whenever a creature you control attacks and isn't blocked, if it has deathtouch, defending player gets a poison counter.