Undercut!

"Undercut!" can only be destroyed by an effect that is able to specifically target "Undercut!"
"Undercut!" and its effects can only be utilized by the owning player.

{x} + {b} - Undercut (Target a creature and Pay {x} where {x} is equal to the Toughness -1 of the targeted creature, that creature is then "sold" and its removed from play, Player who owned targeted creature loses 1 life point, Player gains 1 life point)