You can find out more about the three recognised errors and WoTC Aerodactyl Unlimited Cosmos in my other posts
It tends to be a little bit lackluster in Limited, but it still basically works as a Manalith with a bit of upside which isnt the worst card imaginable
The biggest offender here is wiping away graveyards, which cripples a lot of the recursion people would use to build back from a comprehensive board wipe like this
Functionally this is just Wrath of God and beyond the needs of the colours they are exactly as good as each other
(6/6/2025) To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Fire Crystal's first ability)
If you don't play the exiled card, it remains in exile