Frightshroud Courier is a uncommon Creature — Zombie card from Onslaught (ONS), collector number 149. Current market price: $0.14 (foil $1.03), TCGplayer market prices via Scryfall.
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.)