I don't know... Dragon Soul was never really played for a good reason, and turning it into a minion certainly isn't making it more attractive, even though the class is different.
Then again, with spells like Ray of Frost and Magic Trick, it's not entirely unreasonable either. If Cyclone Mage was in a better spot than it is currently, I'd say it's worth including, either allowing you to have a big cyclone turn to fill your hand, or fill your board with 5/5s, or in the best case do both. Unfortunately, the big upside of Mana Cyclone was that it could be played after Elemental Evocation, while this has to be played BEFORE you start chaining spells, making it much more difficult to use. Also, Cyclone is already good after 3 or 4 spells, while this should at least summon one, preferably 2 5/5s to give you enough of an advantage, and 6 spells is quite a lot. Sorcerer's Apprentice can help, but you'll need enough mana for it.
The stats are fair, so it might actually survive a turn if you play it on 3. But again, it obviously goes into Cyclone Mage, which is not very good right now. The quest was no help so far either.
I'd say this is a "maybe" card. Not terrible, it has a bit of potential, but I'm not very optimistic about it.
Its a bit funny to call this mediocre to weak compared to the other cards revealed so far, but it kind of is. The power creep is disgusting. Already multiple ways to deal with that kind of board with 1 card each.
while this has to be played BEFORE you start chaining spells, making it much more difficult to use.
I don't see why you believe that to be true. If you play one spell before this and two after, you have still played three spells in a turn.
In fact, I strongly suspect Elemental Evocation synergy is a big part of their reason for making this an Elemental.
I could be mistaken, but doesn't Dragon Soul also only count spells that were played after it? It has a little counter on it that starts out blank when you play it, regardless of how many spells you used that turn already, and I strongly assume it will be the same here, considering that the card text is the same (aside from summoning elementals instead of dragons). How would it make sense if it counted spells while it's still on hand? Wouldn't it seem a bit weird if you could play 3 (or 6) spells, then summon this and suddenly have 1 or 2 elementals on the board?
I can try out Dragon Soul again if you insist, but I expect the card to only count spells while it is in play. I'd be happy if I was wrong and it indeed behaves as you say.