Me: Sure, why don't we go back to the beginning
There are very few ways to actually lose energy counters outside of spending them, but it is possible with stray cards like Suncleanser and Final Act
Dont be afraid to use existing Magic cards as a resource to find inspiration or make sure your cards are realistic (unless you want to design joke cards like 10,000 Emrakuls
Early on, it can copy small utility creatures, while later turns let it become a flying version of the best threat on the board
Animate Graveyard (UNF-065) - Unfinity Animate Graveyard (UNF-065) - Unfinity Wizards of the Coast This item is like new, pulled from a sealed pack
Id at least add the Incinerator to EDH decks interested in a big red dragon, and maybe a Standard ramp deck that could reliably give this dragon haste