Gin, Gad, & Gor

Mountainwalk, Ward {x}
Sacrifice three Mountains: Regenerate Gin, Gad,
& Gor
The value of X on all permanents is equal to the
number of mountains in play.
If a player would cast a spell with {x} in it's mana
cost, {x} can not be paid for and is instead equal
to the number of mountains in play.