One of the most important cards in the archetype, Wind-Up Shark, was designed entirely with this purpose in mind, as it allowed players to go for different XYZ monsters depending on what the board state called for
You don't wanna trade up with your commander
Latias is slightly worse though: It has 10 less HP than Latios and 10 less attack on its secondary move Searing Flame
This means that if you submit a card for $32.99, but it receives a PSA 10 worth more than $1,000, PSA will upcharge you to its highest tier (the $64.99 Value Max) before shipping the now-slabbed card to you
Its a tad bit expensive to keep recasting, but Mosswood Dreadknight offers a consistent stream of card advantage while being a pesky body in the meantime
This was basically a way to steal Yugis Slifer the Sky Dragon, and outside of that has no actual reason to be in a deck