Forest

Marath, Will of the Wild

Marath, Will of the Wild enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it.
{X}, Remove X +1/+1 counters from Marath: Choose one —
• Put X +1/+1 counters on target creature. X can't be 0.
• Marath deals X damage to any target. X can't be 0.
• Create an X/X green Elemental creature token. X can't be 0.

Planar Birth

Return all basic land cards from all graveyards to the battlefield tapped under their owners' control.

Mountain

Bearer of the Heavens

When Bearer of the Heavens dies, destroy all permanents at the beginning of the next end step.