Comet Storm [Worldwake Prerelease Promos] Elder Dragon you may pay {X}

you may pay {X}

Set: Dark Ascension Type: Creature — Human Rarity: Uncommon Cost: {4}{G} Vigilance

guess again

that land doesn't untap during its controller's next untap step

Set: Eternal Masters Type: Artifact Rarity: Mythic Cost: {0} At the beginning of your upkeep

Comet Storm [Worldwake Prerelease Promos] Elder Dragon you may pay {X}Set: Worldwake Prerelease Promos Type: Instant Rarity: Mythic Cost: {X}{R}{R} Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.