For purposes of cards that care about the mana cost of spells, what is the mana cost of a spell with X?
If you cast the spell, the mana cost is X. For example, if you cast it for 2 mana, then Immortal Throne would see it as a 2 cost spell. But, if you aren't casting the spell and it's simply in your hand, spellbook, etc., then X is 0 until you actually cast it.
Market
$0.93
Low
$0.50
Median
$0.96
