Sword of Storms

Whenever you cast an instant or sorcery spell,
put a charge counter on Sword of Storms for
each other instant or sorcery you cast before it
this turn.
Equipped Creature gets +1/+1 for each charge
counter on Sword of Storms.
For as long as there are 10 or more charge
counters on it, Sword of Storms has
"equip {1}".