Symmetra, Vishkar Prodigy

Photon Projector — When Symmetra attacks, put two +1/0 counters on her. During your end step, if Symmetra did not attack this turn, remove a +1/0 counter from her.
Deploy Turret — {x}{w}{u},{t}: Create X Sentry Turrets, a 1/1 artifact creature with Defender.
Photon Barrier — {u}{u}{w}{w}: Creatures you control gain indestructible until your next upkeep.