Donovan Grey, Bladesinger

Other Knights you control get +1/+1.

{1}{u}: Exile target instant with mana value 3 or less from your graveyard with a memory counter on it.

Whenever Donovan Grey attacks, you may copy a card in exile with a memory counter. You may cast the copy without paying its mana cost.

Sacrifice a Knight: Donovan Grey gains hexproof and indestructible until end of turn.