Nulan, Inversed Envoy

When Nulan, Inversed Envoy enters the battlefield, create Khlulhloo, a legendary X/1 blue and red
Avatar Dragon token with flying and "{u}{r}: target creature gains flying until end of turn."
{t}: gain control of target tapped creature.
{t}: target creature you control gains shroud (It can't be the targets of spells or abilities.). You can only have one creature that gained shroud in this manner at once,
and it loses shroud if Nulan leaves the battlefield.