Kira grants an ability to your creatures that triggers when the creature becomes targeted. But if Mutavault is targeted before it actually becomes a creature, it will be too late for the ability to do anything to a spell or ability already on the stack.
Tag: Tectonic Edge
When a land gains or changes subtype
IMPORTANT UPDATE: This article has been updated as of the prerelease of Magic 2014 on July 13; Please refer to the revisions below. Some cards such as the recently reprinted card change a land into a basic land type. When an effect says that a land becomes one of the basic land types (Plains, Island, […]