Dominaria

In Bolas's Clutches | Legendary Enchantment | Aura | Enchant permanent You control enchanted permanent. Enchanted permanent is legendary. | Zack Stella

Lingering Phantom | Creature | Spirit | Whenever you cast a historic spell, you may pay {B}. If you do, return Lingering Phantom from your graveyard to your hand. (Artifacts, legendaries, and Sagas are historic.) | YW Tang

Urgoros, the Empty One | Legendary Creature | Specter | Flying Whenever Urgoros, the Empty One deals combat damage to a player, that player discards a card at random. If the player can't, you draw a card. | Daarken

Grunn, the Lonely King | Legendary Creature | Ape Warrior | Kicker {3} (You may pay an additional {3} as you cast this spell.) If Grunn, the Lonely King was kicked, it enters the battlefield with five +1/+1 counters on it. Whenever Grunn attacks alone, double its power and toughness until end of turn. | Mathias Kollros