Frightshroud Courier

{2}{B} · Creature — Zombie

You may choose not to untap this creature during your untap step. {2}{B}, {T}: Target Zombie creature gets +2/+2 and has fear for as long as this creature remains tapped. (It can't be blocked except by artifact creatures and/or black creatures.)

Motor: se resuelve a mano

Rulings (1)

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.
Wizards of the Coast · 2004-10-04