Allie the Altermind - What Extra Deck?

[Atypical-Abbie]

A little Rank 3 Pendulum Xyz, since I haven't made one of those in a while. It focuses on attaching cards to itself and messing with your opponent's Extra Deck, is able to send Pendulums from your Deck or Extra Deck to the GY to change its Pendulum Scale and boosts Xyz Monsters' ATK/DEF. It changes its effect depending on the zone it's Special Summoned to, either attaching a monster from your opponent's Extra Deck or your GY.

Quote

Pendulum Effect:
Once per turn: You can send 1 Pendulum Monster from your Deck or Extra Deck to your GY, and if you do, this card's Pendulum Scale becomes equal to that card's Pendulum Scale. Xyz Monsters you control gain 500 ATK/DEF.

Monster Effect:

2+ Level 3 monsters / If you can Pendulum Summon Level 3, you can Pendulum Summon this face-up card in your Extra Deck. If this card is Special Summoned to your Extra Monster Zone: You can attach 1 random monster in your opponent's Extra Deck to this card as material. If this card is Special Summoned to your Main Monster Zone: You can target 1 monster in your GY; attach it to this card as material. Once per turn: You can detach any number of materials from this card; your opponent sends the same number of cards from their Extra Deck to the GY. If this card has no materials: You can place this card in your Pendulum Zone.