Incorrect rules interactions
Attached an aura("Feather of Flight") to a nonland permanent of an opponent while I controlled "Eriette, the Beguiler", mana value was the same(4 total).
The nonland permanent was still controlled by the opponent but it should have been under my control after I attached the aura.
3
votes
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Rezzahan#77802
commented
The mana value of the aura has to be equal or less than that of the creature it gets attached to. Feather of Flight has mana value 2, so of course Eriette didn't trigger, when it was attached to a 4-cost creature. Efriette's mana value is irrelevant here.