Ordax, Who Beckons the Rime

Hexproof, trample
Whenever Ordax, Who Beckons the Rime enters
the battlefield or attacks, tap target permanent.
It doesn't untap during its controller's next
untap step.
Whenever Ordax deals 3 or more combat damage
to an opponent, put a frost counter on target
permanent that player controls. Permanents
with frost counters on them can't untap.