You may use this card with all flags if your buddy is a <High Dragon> and this card can only be called by its [Call Cost]. [Call Cost] [When you [Set] a “Primal Reversion” on your field, search your hand or deck for this card. If you searched your deck, shuffle it] When this card enters the field, call up to one “Dragon Deity of Order, Ahura Mazda” And “Dragon Deity of Chaos, Angra Mainyu” from your drop zone without paying their [Call Cost] and those cards become size 0 until they leave the field. All cards on your field are unaffected by your opponent’s card effects and if you have another <High Dragon> monster on your field, this card cannot be destroyed. When this card is destroyed, place a “Primal Reversion” from your field in the drop zone.