The Wand of Watoomb

Creatures equipped with The Wand of Watoomb
gain, "When this creature is targeted by an
instant or sorcery spell, you may counter that
spell and add {x} to your mana pool, where
X is that spell's mana value. Alternatively, you
may counter that spell and deal damage to its controller equal to that spell's mana value."
Equip {5}
Equip sorcerer {3}