Core Set 2021

Frantic Inventory | Instant | | Draw a card, then draw cards equal to the number of cards named Frantic Inventory in your graveyard. | Aaron Miller

Ghostly Pilferer | Creature | Spirit Rogue | Whenever Ghostly Pilferer becomes untapped, you may pay {2}. If you do, draw a card. Whenever an opponent casts a spell from anywhere other than their hand, draw a card. Discard a card: Ghostly Pilferer can't be blocked this turn. | Craig J Spearing

Jeskai Elder | Creature | Human Monk | Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever Jeskai Elder deals combat damage to a player, you may draw a card. If you do, discard a card. | Craig J Spearing

Keen Glidemaster | Creature | Human Soldier | {2}{U}: Target creature gains flying until end of turn. | Caroline Gariba

Lofty Denial | Instant | | Counter target spell unless its controller pays {1}. If you control a creature with flying, counter that spell unless its controller pays {4} instead. | Manuel Castañón

Riddleform | Enchantment | | Whenever you cast a noncreature spell, you may have Riddleform become a 3/3 Sphinx creature with flying in addition to its other types until end of turn. {2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Steve Argyle

See the Truth | Sorcery | | Look at the top three cards of your library. Put one of those cards into your hand and the rest on the bottom of your library in any order. If this spell was cast from anywhere other than your hand, put each of those cards into your hand instead. | Ekaterina Burmak

Shacklegeist | Creature | Spirit | Flying Shacklegeist can block only creatures with flying. Tap two untapped Spirits you control: Tap target creature you don't control. | Igor Kieryluk

Unsubstantiate | Instant | | Return target spell or creature to its owner's hand. | Victor Adame Minguez

Vodalian Arcanist | Creature | Merfolk Wizard | {T}: Add {C}. Spend this mana only to cast an instant or sorcery spell. | Tyler Walpole

Niambi, Esteemed Speaker | Legendary Creature | Human Cleric | Flash When Niambi, Esteemed Speaker enters the battlefield, you may return another target creature you control to its owner's hand. If you do, you gain life equal to that creature's mana value. {1}{W}{U}, {T}, Discard a legendary card: Draw two cards. | Eric Deschamps

Watcher of the Spheres | Creature | Bird Wizard | Flying Creature spells with flying you cast cost {1} less to cast. Whenever another creature with flying enters the battlefield under your control, Watcher of the Spheres gets +1/+1 until end of turn. | G-host Lee