Most decks wont have maindeck outs to something like The Tabernacle at Pendrell Vale, Chalice of the Void or Blood Moon
Rise of the Floodborn Rise of the Floodborn was the second Disney Lorcana set, and featured a tonne of Floodborn characters
In Commander, there are plenty of ways to generate unbelievable amounts of energy get something like a Sphinx of the Revelation going and Galvanic Discharge practically removes any creature by the late game
Overall, this card is a draw engine, and if you build around it, the strategy is perfectly playable, even if it's not to most players' taste, especially as playing cards exerted can be risky against more aggressive decks
LIGHT [24-110L] Bahamut (XVI) When in the Primed state, this cards Special Ability can be used by paying a card with the name Dion for the cost