The Fang of Critias (Blue) [DLCS-EN058] Ultra Rare Match of the Millennium & Twisted Nightmares Set: Raging Battle Card type:

Set: Raging Battle Card type: Effect Monster Rarity: Super Rare Attack: 1850 Defense: 400 Once per turn

Set: Aquapolis Type: Darkness Rarity: Common Retreat cost: Colorless

that was Fusion Summoned using an Effect Monster as material

add 1 "lswarm" monster from your Deck to your hand

The Fang of Critias (Blue) [DLCS-EN058] Ultra Rare Match of the Millennium & Twisted Nightmares Set: Raging Battle Card type:Set: Dragons of Legend: The Complete Series Card type: Normal Spell Rarity: Ultra Rare (This card is also always treated as "Legendary Dragon Critias".) Send 1 Trap from your hand or field to the GY, that is listed on a Fusion Monster that can only be Special Summoned with "The Fang of Critias" (if that card is Set, reveal it), then Special Summon that Fusion Monster from your Extra Deck. You can only activate 1 "The Fang of Critias" per turn.