The Wizard Sluiceface was a powerful wizard, a being who has attained such "power and magical purity" that he's just a head with a really long beard and a cape coming out of his neck. He is infamously known for having a tatoo of XS on the back of his head.
History[]
One day, when he heard Xaq call Magic stupid, he transformed Xaq into a groundhog and forced him to perform a series of challenges to become human again. ("Putz-a-Tony Phil")
He next encountered Xaq in The Shadow Realm. After Xaq again taunted magic and claimed it doesn't exist, Sluicefave transformed Xaq into a snail before teleporting away! ("PCG Anniversary Special II")
At one point, he started to let go of himself, becoming a hermit in rural Scotland, and forgoing most magical activities, besides cooking. Soon, his powers began to weaken, and he reverted to his human form. One day in his hermit tent, he had a vision of a sentient moon being experimented on, causing a portal to open. He decided to travel to Mars, to learn of what was occurring. ("Collision" - Magic Paper Productions)
He later appeared in Lynoire, as Sluiceface the Shop-zard. He had taken on a human form, telling Xaq that his 'goals are beyond your understanding'. Sluiceface still had a burning hatred for Xaq, even going so far as to remove his fingers. In this encounter, he also revealed that he had the power to see past save games. In this game, he is referred to as Sluiceface the Shop-Zard and owns a travelling shop. ("Worlds Collide")