Gadrak, the Crown-Scourge (Promo Pack) [Core Set 2021 Promos] Standardbrawl Set: Modern Horizons 2 Type:

Set: Modern Horizons 2 Type: Creature — Elemental Incarnation Rarity: Mythic Cost: {3}{W}{W} Flash

Set: Modern Horizons 2 Type: Enchantment Rarity: Mythic Cost: {3}{G}{W} Creatures you control get +1/+1

but the cause of the rumblings turned out to be much more benign and bizarre

dethrone (Whenever this creature attacks the player with the most life or tied for the most life

Gadrak, the Crown-Scourge (Promo Pack) [Core Set 2021 Promos] Standardbrawl Set: Modern Horizons 2 Type:Set: Core Set 2021 Promos Type: Legendary Creature Dragon Rarity: Rare Cost: {2}{R} Flying Gadrak, the Crown Scourge can't attack unless you control four or more artifacts. At the beginning of your end step, create a Treasure token for each nontoken creature that died this turn. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")