Tuya Bearclaw

A 2/2 for three whose attack step borrows from the biggest body you already have: the trigger reads the greatest power among your other creatures and adds that number to her base 2/2 as she swings. Run a lone 6/6 and she crashes in as an 8/8; back her with a wall of 1/1 tokens and she stays a modest 3/3 that still has to survive blocks. That single number is the design's whole engine, which makes her a mirror of your best threat, and because the borrowed power stacks on top of that threat's own, she typically becomes the largest creature on the board during combat: your second copy of the biggest clock you already have. The conditionality is the honest cost of the effect. The bonus only appears on the swing, so she asks you to have already fielded a haymaker before she cashes it in. The Human Warrior tag and aggressive Gruul cost suggest a beatdown shell, but the sharper read is as a mobile anthem you point at your own top-end: any deck built toward one enormous creature gets a mobile duplicate of its power for three mana. She does nothing from hand and nothing on defense; the payoff exists only in the window between declaring her as an attacker and the assignment of blocks, when that stolen power lands all at once.