+suck (7)
At the beginning of your upkeep, Creeping Bloodsucker deals 1 damage to each opponent. You gain life equal to the damage dealt this way.
Whenever a creature you control with toughness 4 or greater dies, each opponent loses 2 life and you gain 2 life.
, Sacrifice another creature: Put a +1/+1 counter on Kheru Bloodsucker.
Flying (This creature can't be blocked except by creatures with flying or reach.)
When Rabid Bloodsucker enters the battlefield, each player loses 2 life.
Whenever you crank Sap Sucker, add . Until end of turn, you don't lose this mana as steps and phases end.
Counter target spell, then assemble a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)
Flying
, Discard a card: Stalking Bloodsucker gets +2/+2 until end of turn.
, Sacrifice Urborg Mindsucker: Target opponent discards a card at random. Activate only as a sorcery.
Gatherer works better in the Companion app!
, Sacrifice another creature: Put a +1/+1 counter on Kheru Bloodsucker.