Storm Lens

Whenever you cast an instant or sorcery spell,
put a charge counter on Storm Lens.
Remove X charge counters from Storm Lens: Add
X mana in any combination of {u} and/or {r}.
Remove X charge counters from Storm Lens:
Return target creature with converted mana cost
X or less to its owner's hand.
Remove X charge counters from Storm Lens:
Storm Lens deals X damage to target opponent.