Beholder Invader

Hexproof, Flying
Devoid (This card has no color.)
{x}{u}, {t} Tap target creature. It cannot untap
during its controller's untap step until after that
player has completed X turns.
{b}{b}, {t} Destroy target creature with toughness
less than 5.
{x}{r}, {t} Deal X damage to target player,
creature, or planeswalker.