If you do not have an "Astral" or "Barian" card in your other Pendulum Zone, you cannot Pendulum Summon. You cannot Pendulum Summon monsters, except certain monsters based on the card in your other Pendulum Zone.
● "Astral" card: "Astral" monsters.
● "Barian" card: "Barian" monsters.
These effects cannot be negated.
Once per turn, if you have no cards in your other Pendulum Zone, you can select 1 face-up "Astral" or "Barian" card face-up on your Extra Deck and place it in that Pendulum Zone.
4 Level 4 monsters
You can also Xyz Summon this card by using a "Number 69: Heraldry Crest" you control as the Xyz Material. (Xyz Materials attached to that monster also become the Xyz Materials of this card.) If you can Pendulum Summon Level 4, you can Pendulum Summon this face-up card in your Extra Deck. If this card is Pendulum Summoned, place 3 Xyz Counters on it. You can detach 1 Xyz Material from this card or remove 1 Xyz Counter from this card, target 1 other face-up Xyz Monster on the field; until the End Phase, this card's name and original effect become the same as that monster. You can only use this effect of "Number P69: Heraldry Crest Astral-Barian" once per turn. If this card in the Monster Card Zone is destroyed by battle or card effects, you can destroy as many cards in your Pendulum Zones as possible, then place this card in your Pendulum Zone.