Svyatoy, Blessed Avenger

When Svyatoy, Blessed Avenger enters the
battlefield, each opponent creates a 1/1 black
Cultist creature token.
When Svyatoy attacks for the first time each
turn, if the opponent he attacked controls more
creatures than you, Svyatoy deals 3 damage to
any target and you gain that much life. Then,
untap all creatures you control, and there is
another combat phase after this one, followed by
another main phase.