Whenever Tuya Bearclaw attacks, it gets +X/+X until end of turn, where X is the greatest power among other creatures you control.
Tuya Bearclaw is a midrange/aggro beater that mirrors your biggest creature. Build a board with at least one large fatty, then swing with Tuya, who doubles down by adding the greatest other power to her own stats for a huge, often one-shot-capable hit. Ramp into big threats early, deploy a heavy hitter, and turn Tuya into a commander-damage clock.
Cheap 3-mana commander that scales with your board, making her efficient and hard to ignore
Naturally commander-damage relevant—pairing her with any 7+ power creature threatens lethal
Gruul has the best ramp and fattest beaters in the format to feed her ability
Repeatable threat that comes back from the command zone for low cost
Ability only triggers on attack and depends on having another big creature in play
Highly vulnerable to removal, blockers, and combat tricks since it's all combat-based
No built-in evasion or protection—gets chump-blocked or killed before connecting
Gruul lacks card draw and interaction, so she can run out of gas against control