Its huge, it can cantrip with ravenous, and it exiles the target it fights
If you do build a deck with regeneration themes, youll have to weigh the regenerate mana cost against the flexibility you want each turn
For example, Greninja, which evolves from Frogadier (which, in turn, evolves from Froakie), is usually a Water type Pokemon, but its Tera card is Fighting type
Its also one of the few cards on this list that can generally hold its own in the modern game, though against other Charizards, such as the Dark type, Tera Charizard ex thats currently stomping all over the meta it may well have some trouble
It balances out quite nicely and I think it'll be playable, but it isnt too impactful