This combination introduces a powerful selection of fire and fighting
You are setting up an opponents creature for death, and then you can let someone else kill it to get cards and life, in a nice flurry of card advantage akin to a Veteran Explorer or somesuch
On top of a winning condition revolving "Knock-outs," mechanics are also based on Pokemon concepts in the video games: Evolution, Energy Cards for casting (Pokemon Types), buffing Pokemon (Tools and Supporters), and altering the state of play (Stadium, Trainer Cards)
Pair it with cheap cantrips like Opt or token makers like Raise the Alarm for maximum efficiency
There are two clear clauses that limit this card
Add one mana of that color to your mana pool for each charge counter on Astral Cornucopia.) You can abuse this if you cast it for X=1 and add counters to it through some other means