W.E.L.L.E.R.M.A.N.

W.E.L.L.E.R.M.A.N. cannot be blocked.
W.E.L.L.E.R.M.A.N.'s power is equal to the number of Pirates you control.
Whenever a Pirate you control dies, you may sacrifice a Treasure. If you do, search your library for a Pirate card and put it into your hand.