Jetmir's Fixer

Most firebreathing pumps evaporate at the end step; here the same mana sink learns to keep what it earns. The base ability is ordinary Gruul beatdown math: pay to swing bigger, then decay back down each turn. The wrinkle is the payment clause. Route that colored mana through a Treasure and the temporary +1/+1 hardens into a permanent counter, so the artifacts a deck cracks for ramp or fixing double as a growth engine that survives to the next turn. The subtlety is in the routing: cracking a Treasure means sacrificing it, so this creature does not sidestep the aristocrat-style token economy so much as give it a second reason to exist. Instead of spending Treasures freely on spells, a deck learns to feed them into one target and compound. The ceiling on a 2/2 becomes a function of how many Treasures the deck can manufacture and how patiently it wants to spend them rather than burn them elsewhere. Where earlier red-green firebreathers cared only about how much mana you had access to, this one cares where the mana came from: same-colored payment, two different outcomes. It reads like a common-rate beater and behaves like a build-around, quietly conditioning a deck to hoard its Treasures toward one growing threat rather than cash them the moment they appear.