Soltari Emissary

Most of the Soltari wore evasion as a fixed trait, a creature stranded on one half of a divided battlefield from the moment it hit play. This one carries the keyword as a switch instead: a plain white two-drop that holds the ground on defense, then spends a single white pip to slip into the shadow layer the turn you want to attack. That toggle is the entire design. Cast it for two mana and leave the activation alone, and it is a 2/1 that blocks and trades like any other ground creature; pay one white during your attack and it walks past every blocker that lacks shadow of its own. The cost structure is where the balancing lives. You buy the evasion fresh each turn you want it, so the creature scales with how much loose mana an aggressive deck can spare rather than handing over a permanent keyword for free, and it never strands itself uselessly behind enemy lines on a turn you need a body back to defend. That is the more flexible read on shadow than the static creatures printed alongside it: clear the air when you want damage, or sit in front of attackers when you want a wall, choosing each turn at the cost of a white mana. The static Soltari decided once; this one decides every combat.