Atum, Foreign Survivor

+2: Target creature card in your hand gains dash 0 until end of turn.
-3: Enchant target creature with a colorless aura called Atum's Khopesh. The creature becomes legendary and has double strike and lifelink.
-9: You get an emblem with "Creatures you control have dash X where X is its converted mana cost minus the number of creatures you control."