Forge of the Giants

At the beginning of your upkeep if there are 10
or more forests on the battlefield, sacrifice Forge
of the Giants.
When Forge of the Giants leaves the battlefield,
destroy all forests. Each player searches their
library for X amount of basic lands and puts
them onto the battlefield tapped, where X is half
the amount of Forests destroyed this way.
Red creatures you control get +0/+1.