Rule evolution
Rule 107.3h
Previously numbered 107.3g.
Earliest archived Rules release: 2015-01-23 · 0 wording revisions · 1 renumbering
Added107.3gDetails
If an effect instructs a player to pay an object’s mana cost that includes {X}, the value of X is treated as 0 unless the object is a spell on the stack. In that case, the value of X is the value chosen or determined for it as the spell was cast.
Renumbered
107.3g→ 107.3hDetailsPreviously
1. Game Concepts
107. Numbers and SymbolsThen
1. Game Concepts
107. Numbers and SymbolsIf an effect instructs a player to pay an object’s mana cost that includes {X}, the value of X is treated as 0 unless the object is a spell on the stack. In that case, the value of X is the value chosen or determined for it as the spell was cast.