Nerubian Abductor

Whenever Nerubian Abductor blocks a creature,
put an ice counter on that creature.
You may choose not to untap Nerubian
Abductor during your untap step.
{t}: Tap target creature with an ice counter. That
creature doesn't untap during its controller's
untap step for as long as Nerubian Abductor
remains tapped.