Old Man Willow

Bestow {u/b}{g} (If you cast this card for its bestow cost,
it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Defender, reach (This creature can't attack and can
block creatures with flying.)
Whenever Old Man Willow deals combat damage
to a creature, that creature doesn't untap during
its controller's next untap step.
Enchanted creature doesn't untap during its controller's untap step.