Merciless Executioner

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

Gravelighter

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

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

When this creature enters, each player sacrifices a creature or planeswalker of their choice.