Core Set 2021

Chandra's Magmutt | Creature | Elemental Dog | {T}: Chandra's Magmutt deals 1 damage to target player or planeswalker. | Kimonas Theodossiou

Chandra's Pyreling | Creature | Elemental Lizard | Whenever a source you control deals noncombat damage to an opponent, Chandra's Pyreling gets +1/+0 and gains double strike until end of turn. (It deals both first-strike and regular combat damage.) | Josu Hernaiz

Conspicuous Snoop | Creature | Goblin Rogue | Play with the top card of your library revealed. You may cast Goblin spells from the top of your library. As long as the top card of your library is a Goblin card, Conspicuous Snoop has all activated abilities of that card. | Zoltan Boros

Heartfire Immolator | Creature | Human Wizard | Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) {R}, Sacrifice Heartfire Immolator: It deals damage equal to its power to target creature or planeswalker. | Donato Giancola

Hobblefiend | Creature | Devil | Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) {1}, Sacrifice another creature: Put a +1/+1 counter on Hobblefiend. | Nicholas Gregory

Igneous Cur | Creature | Elemental Dog | {1}{R}: Igneous Cur gets +2/+0 until end of turn. | Igor Kieryluk

Alpine Houndmaster | Creature | Human Warrior | When Alpine Houndmaster enters the battlefield, you may search your library for a card named Alpine Watchdog and/or a card named Igneous Cur, reveal them, put them into your hand, then shuffle. Whenever Alpine Houndmaster attacks, it gets +X/+0 until end of turn, where X is the number of other attacking creatures. | Mark Behm