Banished Knight's Halberd

Banished Knight's Halberd enters the battlefield
with eight level counters on it.
{t}, Remove two level counters from this artifact:
Place a level counter on target artifact you control.

Equip {3}{w}

Equipped creature has:
Level 0-4: +1/+1
Level 5-7: +1/+1 and first strike
Level 8+: +1/+1 and double strike