Salty has said that spells are going to be reworked in the future.
Basically, I’d say it’s very safe to consider any spell that costs 50 mana (IMO a placeholder mana cost) highly subject to change. The vast majority of them are extremely overpowered for what they do for what they cost to cast. They will be balanced out at some point in the future. It’s just not the highest priority for the devs right this second. Keeping the client and server from crashing is, like they currently do on a daily basis.
Salty restated this again on yesterday’s GoW stream.