Grave Pact, Night Soil, and Lifeline

, Exile two creature cards from a single graveyard: Create a 1/1 green Saproling creature token.

Whenever a creature dies, if another creature is on the battlefield, return the first card to the battlefield under its owner's control at the beginning of the next end step.

Sacrifice a creature: This creature gets +2/+2 until end of turn.

Whenever a creature you control dies, each other player sacrifices a creature of their choice.

When this creature dies, create a 1/1 green Saproling creature token.