Valleymaker

Oracle Text

T, Sacrifice a Mountain: Valleymaker deals 3 damage to target creature.

T, Sacrifice a Forest: Choose a player. That player adds GGG.

Card Rulings

10/1/2009 The second ability is a mana ability. It doesn’t target a player and it doesn’t use the stack. If the player who adds to their mana pool can’t spend all of it before the phase ends, the remaining mana will leave their mana pool at the end of the current step (or phase).