Core Set 2021

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

Experimental Overload | Sorcery | | Create an X/X blue and red Weird creature token, where X is the number of instant and sorcery cards in your graveyard. Then you may return an instant or sorcery card from your graveyard to your hand. Exile Experimental Overload. | Lie Setiawan

Dire Fleet Warmonger | Creature | Orc Pirate | At the beginning of combat on your turn, you may sacrifice another creature. If you do, Dire Fleet Warmonger gets +2/+2 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.) | Mathias Kollros

Leafkin Avenger | Creature | Elemental Druid | {T}: Add {G} for each creature with power 4 or greater you control. {7}{R}: Leafkin Avenger deals damage equal to its power to target player or planeswalker. | Filip Burburan

Radha, Heart of Keld | Legendary Creature | Elf Warrior | As long as it's your turn, Radha, Heart of Keld has first strike. You may look at the top card of your library any time, and you may play lands from the top of your library. {4}{R}{G}: Radha gets +X/+X until end of turn, where X is the number of lands you control. | Chris Rahn

Sanctum of All | Legendary Enchantment | Shrine | At the beginning of your upkeep, you may search your library and/or graveyard for a Shrine card and put it onto the battlefield. If you search your library this way, shuffle. If an ability of another Shrine you control triggers while you control six or more Shrines, that ability triggers an additional time. | Johannes Voss