Core Set 2020

Aether Gust | Instant | | Choose target spell or permanent that's red or green. Its owner puts it on the top or bottom of their library. | Tomasz Jedruszek

Brineborn Cutthroat | Creature | Merfolk Pirate | Flash (You may cast this spell any time you could cast an instant.) Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Brineborn Cutthroat. | Caio Monteiro

Cerulean Drake | Creature | Drake | Flying Protection from red (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything red.) Sacrifice Cerulean Drake: Counter target spell that targets you. | Daniel Ljunggren

Renowned Weaponsmith | Creature | Human Artificer | {T}: Add {C}{C}. Spend this mana only to cast artifact spells or activate abilities of artifacts. {U}, {T}: Search your library for a card named Heart-Piercer Bow or Vial of Dragonfire, reveal it, put it into your hand, then shuffle. | Eric Deschamps

Lightning Stormkin | Creature | Elemental Wizard | Flying Haste (This creature can attack and {T} as soon as it comes under your control.) | Rudy Siswanto