Necrologia

Cast this spell only during your end step.
As an additional cost to cast this spell, pay X life.
Draw X cards.

Backlash

Tap target untapped creature. That creature deals damage equal to its power to its controller.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Breath of Malfegor

Breath of Malfegor deals 5 damage to each opponent.

Mogis, God of Slaughter

Indestructible
As long as your devotion to black and red is less than seven, Mogis isn't a creature.
At the beginning of each opponent's upkeep, Mogis deals 2 damage to that player unless they sacrifice a creature.

Soul Shatter

Each opponent sacrifices a creature or planeswalker with the highest mana value among creatures and planeswalkers they control.