You may choose not to untap this creature during your untap step.
, : Target Wizard creature gets +2/+2 and has shroud for as long as this creature remains tapped. (It can't be the target of spells or abilities.)
It checks the creature type when the ability is announced and resolved, but once the effect is placed on the creature, if its creature type changes the effect still continues.
: Target Wizard creature gets +2/+2 and has shroud for as long as this creature remains tapped. (It can't be the target of spells or abilities.)