Duskblade Sell Sword

Firststrike, Vigilance, lifelink
Pay life greater than the number of price counters
on Vampire Sell Sword, gain control of Vampire
Sell Sword and untap it. When you gain control
of Vampire Sell Sword, add X price counters to it
where X is the difference between life paid, and
price counters on Vampire Sell Sword. Any player
may activate this ability.