Gyrus, Waker of Corpses

A graveyard-recursion engine wired to a combat trigger, with a scaling clause that turns its own size into fuel. The X cost feeds the +1/+1 counters directly, so the card wants to be cast big, and the bigger it lands the wider the pool of legal recursion targets: the attack trigger reanimates only creatures with power strictly less than Gyrus's own. That threshold is the whole balancing mechanism. Pump the body and you unlock heavier reanimation; keep it small and the graveyard toolbox stays capped at the trivial. The token is deliberately ephemeral (tapped and attacking, then exiled at end of combat), so this is a swing-for-value engine rather than a permanent reanimator like Sheoldred, Whispering One: you get the copy's entry trigger, the attack, and its death trigger if you have a sacrifice outlet, but never the standing body. The exile-on-recur is the tax that keeps it from looping the same creature every turn, forcing the deck toward a stocked graveyard of varied threats rather than one recursive engine piece. The feedback loop between size and reach is what gives the design its shape: every counter both hits harder in combat and widens what you can steal back from the yard, so the card is at once the payoff and the enabler of a Jund attackers-and-sacrifice shell.