Bloodspeaker Kasiir

Deathtouch, Flying, Lifelink
Bloodtaker Kasiir's power and toughness are each equal to the number of non-Artifact creatures in each graveyard plus the number of non-Artifact creatures on the battlefield.
At the beginning of upkeep on your turn, gain control of target non-Artifact creature with power less than Bloodtaker Kasiir's as long as Bloodtaker Kasiir remains in play.