Undead Parasite

Bestow {2}{b}{b}
{b}, {t}: Untap enchanted creature. You gain
control of it until end of turn, and it gains
haste. Experiment. Only Undead Parasite's
owner may activate this ability.
{1}: Return Undead Parasite to its owners hand.
Activate only if Undead Parasite is a creature.

Grendhelt had discovered how to hide within living
flesh.