Symmetra, Defensive Master

Improvise
Artifacts you control have improvise.
{1}{w}: Create a Sentry Turret token. It has, "{t}: Deal 3 damage to target attacking or blocking creature." You may not exceed 3 of these tokens.
{u}, {t}: Exile target creature, then return it to the battlefield. If it didn't have summoning sickness
it gains haste until end of turn.