best dragon deck yugioh legacy of the duelist Yu-Gi-Oh! Duelist: Link Evolution Yu-Gi-Oh: Legacy Of The Duelist

Yes, we'll need to exile them afterwards, but maybe we need a boardwipe like Damnation or a removal spell like Murder

Alternatively, if your Fossil Card is not knocked out, you can discard it and switch your current Pokemon back in immediately

This will just serve as a guide on thought process of where to put a1a-32-mew-ex.

10 Terror Of The Peaks Burn Them All

The effect reads, If this card is sent from the field to the GY: Add 1 monster with 1500 or less ATK from your Deck to your hand If Sangan (as a material) is detached from an XYZ monster and sent to the graveyard, then its effect wont activate since it was technically not on the field before going to the GY