When this card is Xyz Summoned: You can move it to another of your Main Monster Zones. There must be a face-up Link monster on the field to activate and to resolve this effect. Once per turn (Quick Effect): You can detach 1 material from this card; Special Summon 1 "CPU Task V Token" (Cyberse/DARK/Level 1/ ATK 500 /DEF 500) to your opponent's side of the field. They cannot be used as Link Materials. If this card has 2 or more materials when this effect was activated: You can also draw 1 card.
During your Main Phase 1: You can excavate the top 3 cards of your deck; add all Fiend monsters excavated to your hand and send the other cards excavated to the bottom of your deck in any order. You must have 2 or less cards in your hand to activate and resolve this effect. You can only use this effect of "Horn of Pandemonium" once per turn.
I was about to say: It's gonna be smtg like: "Reveal 1 Fusion monster from your ED; add 1 Spell that is listed on it" but then I remember "Dragon Knight" doesn't specify Timaeus in its text. But in case that happened, you can run Amulet Dragon to search timaeus and SS Knight.