Rule evolution
Rule 702.140a
Previously numbered 702.139a.
Earliest archived Rules release: 2020-04-17 · 0 wording revisions · 1 renumbering
Added702.139aDetails
Mutate appears on some creature cards. It represents a static ability that functions while the spell with mutate is on the stack. “Mutate [cost]” means “You may pay [cost] rather than pay this spell’s mana cost. If you do, it becomes a mutating creature spell and targets a non-Human creature with the same owner as this spell.” Casting a spell using its mutate ability follows the rules for paying alternative costs (see 601.2b and 601.2f–h).
Renumbered
702.139a→ 702.140aDetailsPreviously
7. Additional Rules
702. Keyword AbilitiesThen
7. Additional Rules
702. Keyword AbilitiesMutate appears on some creature cards. It represents a static ability that functions while the spell with mutate is on the stack. “Mutate [cost]” means “You may pay [cost] rather than pay this spell’s mana cost. If you do, it becomes a mutating creature spell and targets a non-Human creature with the same owner as this spell.” Casting a spell using its mutate ability follows the rules for paying alternative costs (see 601.2b and 601.2f–h).