As for the X spells themselves, that includes a rich variety of Hydras such as Hydroid Krasis, which is overwhelmingly strong even without Zaxara there to generate additional value on the side, along with other staple Hydras like Lifeblood Hydra, Protean Hydra, and the mighty Genesis Hydra
Gontis Aether Heart Gonti's Aether Heart uses artifactfall to build up energy counters, and triggering on itself entering means it qualifies for the list
[ New Game Design ]
Crispin is used to draw two Basic Energy and attach one to a Pokemon ideally, attach a Metal Energy to Gholdengo ex
If you watch "opening" videos on YouTube, you will notice that people usually move a few cards from the bottom of the booster pack to the top
25-26 total mana sources is usually enough, but this can be scaled up if you frequently face a bevy of land destruction