Ultimate Weapon
After you collect all of the Titan Tablets, Priest's Amulets, and Emperor's Coins and place them each in their required pillars, a gaint stone tablet will appear in the middle of Elysiam (near where the she-wolf statue is). Activate the gaint stone tablet to be taken to a place where you may choose your Ultimate Weapon. Choose one of the three pillars to activate the desired Ultimate Weapon Challenge.