The Edge of Deraria

Having siblings must suck, but what if you had thirteen of them? Not related by blood or marrage, but rather by magic. A strange boy now needs to learn to trust his siblings, because with-
Fourteen brainwashing masks,
Thirteen genocidal maniacs,
Twelve legendary weapons,
Eleven memories,
Ten commandments to follow,
Nine gears for the ultimate weapon,
Eight elements you can harness,
Seven sins to avoid,
Six prophet's visions,
Five mythical gardians,
Four hearts to purify,
Three sages of power,
Two potential futures for the world,
and One mountain that holds all the answers...
He will need all the support he can get!