Zendikar Rising

Roost of Drakes | Enchantment | | Kicker {2}{U} (You may pay an additional {2}{U} as you cast this spell.) When Roost of Drakes enters the battlefield, if it was kicked, create a 2/2 blue Drake creature token with flying. Whenever you cast a kicked spell, create a 2/2 blue Drake creature token with flying. | Bayard Wu

Concerted Defense | Instant | | Counter target noncreature spell unless its controller pays {1} plus an additional {1} for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.) | Chris Rallis

Ruin Crab | Creature | Crab | Landfall — Whenever a land enters the battlefield under your control, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.) | Simon Dominic

Merfolk Windrobber | Creature | Merfolk Rogue | Flying Whenever Merfolk Windrobber deals combat damage to a player, that player mills a card. (They put the top card of their library into their graveyard.) Sacrifice Merfolk Windrobber: Draw a card. Activate only if an opponent has eight or more cards in their graveyard. | Colin Boyer