Spark Double [War of the Spark Prerelease Promos] XY135 sacrifice Koskun Falls unless you

sacrifice Koskun Falls unless you tap an untapped creature you control

"King's Knight"

or 1 card that specifically lists "Dark Fusion" in its text

You can banish this face-up card you control

Set: Dragons of Legend Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 1800 Cannot be Normal Summoned/Set

Spark Double [War of the Spark Prerelease Promos] XY135 sacrifice Koskun Falls unless youSet: War of the Spark Prerelease Promos Type: Creature Illusion Rarity: Rare Cost: {3}{U} You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1 +1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary if that permanent is legendary.