6eeba363_onsters___Yu_Gi_Oh__Card_Guide__Card_Text
[Card Name] Sephylon, the Ultimate Timelord [Type] Effect Monster [Attribute] LIGHT [Sub Type] Fairy [ATK] 4000 [DEF] 4000 [Card Text] 
Cannot be Normal Summoned or Set. Must be Special Summoned (from your hand) by having 10 or more monsters in your Graveyard, and cannot be Special Summoned by other ways. Once per turn: You can Special Summon 1 Level 8 or higher Fairy-Type monster from your hand or Graveyard, but its effects are negated and its ATK becomes 4000.
Yu-Gi-Oh! Level 10 Monsters - Yu-Gi-Oh! Card Guide