Gilder Bairn

Doubling is one of Magic's most dangerous verbs, and this Ouphe applies it to the broadest possible noun: not power, not life, but every kind of counter on a permanent at once. A single +1/+1 counter becomes two, then four; a planeswalker's loyalty vaults past its ultimate; a charged artifact's last charge turns into a runaway resource. The rhythm is what makes it tick, because the activation demands the Ouphe untap to pay it, which means it has to be tapped first. In practice that usually means swinging into combat, then untapping to fire off the double, so the body and the engine compete for the same turn. To loop the doubling you need a way to tap it back down (a creature with an outlet that asks you to tap it, or any repeatable tapper), which makes the geometric payoff a deliberate build rather than a free repeat. Casting it and activating it both lean on the same green-or-blue flexibility, letting the effect live in counter strategies without a strict color demand. What balances it is plain: the ability is not free, it targets a single permanent, and it does nothing on an empty board, so the payoff scales entirely with how many counters you can already manufacture. That makes it a multiplier bolted onto an engine, built for the player who has already solved how to make counters and now wants to ask how many.