Shoukanjuu Cocytus / Cocytus the Eidolon Beast
Water Dragon / Fusion / Effect
LV6 1000/2900
“Aleister the Eidolon Summoner” + 1 WATER monster
(1) Cannot be targeted, or destroyed by, an opponent’s card effect.
(2) This card can attack while in face-up Defense Position. If it does, apply its ATK for damage calculation.

Source: The official site