It's for the Fusion part of the current event, so I can't Xyz sadly. But that is what I would do were I in the Xyz category.
The biggest problem really is that Therions can't fucking equip from hand. I really dunno why they're made that way and then have like a single spell that allows pitching of Therion cards.
Also had a SwoSo fucko counter my ass with D Fissure. Turns out it fucking turns off Regulus
"Iwata was awesome" - Mr. Nintendo
https://i.imgur.com/krtFHol.jpg