Savra says No

Sacrifice this creature: Prevent all combat damage that would be dealt this turn.

Whenever a creature with power 1 or less is put into your graveyard from the battlefield, you may return that card to the battlefield at the beginning of the next end step if Shirei is still on the battlefield.

Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature of their choice. Whenever you sacrifice a green creature, you may gain 2 life.

This creature enters with a -1/-1 counter on it. , Remove a -1/-1 counter from this creature: Destroy target artifact or enchantment.

Sacrifice this creature: Put a -1/-1 counter on target creature.