Merciless Executioner

When Merciless Executioner enters, each player sacrifices a creature of their choice.

Plaguecrafter

When Plaguecrafter enters, each player sacrifices a creature or planeswalker of their choice. Each player who can't discards a card.

When Fleshbag Marauder enters, each player sacrifices a creature of their choice.

Flying
When Gravelighter enters, draw a card if a creature died this turn. Otherwise, each player sacrifices a creature of their choice.

When Demon's Disciple enters, each player sacrifices a creature or planeswalker of their choice.