Kaldheim

Tuskeri Firewalker | Creature | Human Berserker | Boast — {1}: Exile the top card of your library. You may play that card this turn. (Activate only if this creature attacked this turn and only once each turn.) | Victor Adame Minguez

Arni Brokenbrow | Legendary Creature | Human Berserker | Haste Boast — {1}: You may change Arni Brokenbrow's base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate only if this creature attacked this turn and only once each turn.) | Dmitry Burmak

Breakneck Berserker | Creature | Dwarf Berserker | Haste | Scott Murphy

Birgi, God of Storytelling | Legendary Creature | God | Whenever you cast a spell, add {R}. Until end of turn, you don't lose this mana as steps and phases end. Creatures you control can boast twice during each of your turns rather than once. | Eric Deschamps

Aegar, the Freezing Flame | Legendary Creature | Giant Wizard | Whenever a creature or planeswalker an opponent controls is dealt excess damage, if a Giant, Wizard, or spell you controlled dealt damage to it this turn, draw a card. | Chris Rahn

Svella, Ice Shaper | Legendary Snow Creature | Troll Warrior | {3}, {T}: Create a colorless snow artifact token named Icy Manalith with "{T}: Add one mana of any color." {6}{R}{G}, {T}: Look at the top four cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order. | Andrew Mar