Majiosheldon (LVAL-EN044) - Legacy of the Valiant Unlimited

Cannot be Special Summoned, except by its own effect. During your next Standby Phase after this card was Tributed for a Tribute Summon, if this card is in your Graveyard: You can Special Summon this card from your Graveyard. You cannot Special Summon monsters from your Extra Deck the turn you activate this effect.