Invasion of Mercadia // Kyren Flamewright

The battle side is a two-mana loot that upgrades: discard a card, draw two, and you come out ahead on cards while planting a permanent that reshapes the combat math around it. That is where the flip cost hides. A Siege sits under the protection of an opponent you choose, and you have to attack through that protection to defeat it, so the reward on the back is gated behind combat you commit to, not a timer that ticks for free. What waits on the far side is Kyren Flamewright, a Goblin Spellshaper whose repeatable ability converts spare cards into a small red-blue army with a team anthem and haste, an engine in the lineage of the channel-your-hand-into-a-board effects Spellshapers have traded in since the class debuted. The two halves rhyme: the front loots to smooth the road, and the back keeps feeding on your hand to make bodies that swing the turn they land. The design is unusual for a battle in how little it asks to be worth casting on rate alone. A draw-two loot that also forces opponents to make a defense decision is already a fair play; the Spellshaper is upside for the long game, not a build-around prerequisite. It threads the battle mechanic's central risk (that a slow defeat leaves you holding a do-nothing permanent) by front-loading value the moment it enters and back-loading a token engine that scales with whatever hand you have left to spend.