Altar of the Venomous

When Altar of the Venomous enters the battlefield, place a -1-1 counter on up to three target creatures.
Sacrifice a creature with a -1-1 counter: Put a -1-1 counter on all creatures target opponent controls, then draw 1 card and lose 1 life.
"I offer you the forbidden knowledge only the true Mother of Scales would know. I offer you the blueprint for death perfected." -Hapatra