Dark Guardian

(This card is always treated as a "Gate Guardian" card.)
Cannot be Normal Summoned/Set. Must be Special Summoned with "Dark Element", or (from your hand or GY) by shuffling 1 "Sanga of the Thunder", 1 "Kazejin", and 1 "Suijin" into the Deck, from among your face-up cards on the field, in your hand or GY, and/or your face-up banished cards. Cannot be destroyed by battle. This card Special Summoned with "Dark Element" is unaffected by other monsters' effects and your opponent's activated Spell effects.