Chthonian Emperor Dragon [TAEV-EN019] Ultimate Rare Pharaoh Tour Promos while it has an Xyz

while it has an Xyz Material attached that was originally Dragon-Type

immediately after this effect resolves

while it remains on the field all of your opponent's monsters lose 300 ATK

where X is the number of times you have boosted this combat chain

if your Spellcaster monster battles an opponent's monster (Quick Effect): You can reveal any number of Spells with different names in your hand

Chthonian Emperor Dragon [TAEV-EN019] Ultimate Rare Pharaoh Tour Promos while it has an XyzSet: Tactical Evolution Card type: Gemini Monster Rarity: Ultimate Rare Attack: 2400 Defense: 1500 This card is treated as a Normal Monster while face up on the field or in the Graveyard. While this card is face up on the field, you can Normal Summon it to have it be treated as an Effect Monster with this effect: This card can attack twice during the same Battle Phase.