mewtwo holographic pokemon card value GX 31/68 Holo Rare Near Mint Captured in a crystal Mewtwo Holo - Detective Pikachu

I tossed in a few mana rocks that can sacrifice for cards like Mind Stone and Commander's Sphere to loop with this

We have plenty of dragon support cards as well, like Dragon Tempest for haste and burn, Minion of the Mighty which cheats dragons into play, Lozhan, Dragons' Legacy burns when we cast dragons, and Lathliss, Dragon Queen which makes even more dragons

The tokens are exact copies of the creature, so they retain its ability to duplicate further, meaning you get exponential growth if you can continue to draw extra cards

For example, if you gained 3 life this turn and also lost 2 life this turn, X is 3, not 1

Senseis Divining Top had a similar rarity from a similar set