Rule evolution
Rule 702.140b
Previously numbered 702.139b.
Earliest archived Rules release: 2020-04-17 · 0 wording revisions · 1 renumbering
Added702.139bDetails
As a mutating creature spell begins resolving, if its target is illegal, it ceases to be a mutating creature spell and continues resolving as a creature spell and will be put onto the battlefield under the control of the spell’s controller.
Renumbered
702.139b→ 702.140bDetailsPreviously
7. Additional Rules
702. Keyword AbilitiesThen
7. Additional Rules
702. Keyword AbilitiesAs a mutating creature spell begins resolving, if its target is illegal, it ceases to be a mutating creature spell and continues resolving as a creature spell and will be put onto the battlefield under the control of the spell’s controller.