If this card is Tributed by a card effect: You can add 1 Spellcaster-Type "Nekroz" Ritual Monster from your Deck to your hand. If this card is banished: You can send 1 "Nekroz" monster from your Deck to the Graveyard, except "Great Sorcerer of the Nekroz". You can only use 1 "Great Sorcerer of the Nekroz" effect per turn, and only once that turn.
Activates from your Graveyard / Adds from Deck to hand / Sends from your Deck to your Graveyard
Using Nekroz power can change your age temporarily, usually making you older, and "Gishki Avance" has it the hardest here lol.
Amusingly when he wears fallen beings as armor (for example, when he becomes "Nekroz of Valkyrus"), he actually de-aged. And when he becomes "Zefrasaber, Swordmaster of the Nekroz", he's a young man XD