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[REACTION] (Play any time, even before spells and abilities resolve.) Choose a friendly unit and a spell. Counter that spell and give that unit + ...

When one of your units becomes [MIGHTY], you may exhaust me to channel 1 rune exhausted. (A unit is Mighty while it has 5+ Might.)

When a buffed unit you control would die, you may pay rune and exhaust me to spend its buff and recall it exhausted instead. (Send it to base. This...