Kytheon's Tactics
b0521669-206e-4909-be6f-a74603203a70
$0.25 CND
Creatures you control get +2/+1 until end of turn.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures also gain vigilance until end of turn. (Attacking doesn't cause them to tap.)