Anonymous Hacker

Spy {1}{u/b}(You may pay an additional {1}{u/b} as you play this spell. If you do, this creature enters the battlefield under target opponents control.)

At the beginning of each combat, creatures you control gain first strike until end of turn if the player that controls Anonymous Hacker has a creature with first strike. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, skulk, trample, and vigilance.