Dominaria

Kazarov, Sengir Pureblood | Legendary Creature | Vampire | Flying Whenever a creature an opponent controls is dealt damage, put a +1/+1 counter on Kazarov, Sengir Pureblood. {3}{R}: Kazarov deals 2 damage to target creature. | Igor Kieryluk

Torgaar, Famine Incarnate | Legendary Creature | Avatar | As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way. When Torgaar, Famine Incarnate enters the battlefield, up to one target player's life total becomes half their starting life total, rounded down. | Lius Lasahido

Verdant Force | Creature | Elemental | At the beginning of each upkeep, create a 1/1 green Saproling creature token. | Viktor Titov

Primevals' Glorious Rebirth | Legendary Sorcery | | (You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Return all legendary permanent cards from your graveyard to the battlefield. | Noah Bradley