Arckos, Soul Scarred

When Arckos, Soul Scarred enters the battlefield, you may sacrifice 3 creatures you control. If you do,
choose one-
•Each player lose life equal to the number of creatures they control
•Search your library for a card, put that card into
your graveyard, then shuffle.
{p/g}{p/g}{p/g}, Sacrifice Arckos, Soul Scarred and
another creature: Return target creature card
from your graveyard to the battlefield.