Manadeath

Menace, Death-Touch
When Manadeath enters the battlefield, at the beginning of your next upkeep choose a player,
that player may pay up to eight mana of any color,
for each mana less than eight they pay deal 7
damage to them.
Sacrifice two creatures you control with power 3
or 4: destroy target creature with power 7 or less, gain life equal to its toughness.
"doomsday"