Scab-Clan Berserker
The clearest punishment-for-passivity creature red ever got, built so its threat scales with how much your opponent wants to interact. The first hit is free thanks to haste, and renown turns that hit into a permanent upgrade and a switch flip: once the counter lands, every noncreature spell the controlling player's opponent casts becomes a two-damage tax. That structure flips the usual dynamic between aggression and control on its head. Normally the burn deck wants to empty its hand while the answer-heavy deck patiently picks it apart; here, the act of casting removal, a counterspell, or a sweeper draws blood on its own, and the opponent's instinct to stabilize is exactly what closes the game. The body is fragile, so the whole exchange hinges on connecting once before it dies, which gives the design a real tension: it asks the aggressor to commit to the attack and the defender to decide whether killing it next turn is worth the spell it costs to do so. Renown is the lever that makes both halves work, gating the damage engine behind combat success rather than handing it out at cast. It belongs to the small family of creatures (Eidolon of the Great Revel, Harsh Mentor) that turn an opponent's own spellcasting into a clock, but it is the one that demands a swing first and rewards you twice for landing it.
