You may choose not to untap this creature during your untap step.
, : Target Goblin creature gets +2/+2 and has haste for as long as this creature remains tapped.
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 Goblin creature gets +2/+2 and has haste for as long as this creature remains tapped.