If it could be the first or second turn - potentially like belcher - I don't see how it would necesarily be any worse
The problem with the idea is summoning sickness. In Belcher, you dump your hand and win right away. But think about what you would need in order to do to win off this card. You'd need to do one of two things:
1. Play creatures, pass, than cast pump Mist the next turn. The problem is that after dumping a big pile of Kobolds on the first turn you're unlikely to have all that many cards left for storm on the second turn. In other words, you can't use a Kobol to generate both damage and storm, which really hurts the concept. Unless...
2. You give your team haste. This, however, has its own set of problems. Using a card like Concordant Crossroads for a turn 1/2 kill requires that you have Crossroads, Mist, and a bunch of guys, and the mana to cast it all. That's a lot of combo pieces that you need to assemble themselves in your opponenting hand. Belcher is a single-card combo, meaning you have a much easier time winning. Dedicating cardslots to Kobolds isn't generally as good as dedicating cardslots to mana and searching.
If anything, this card might be worth testing in Affinity which can dump a pile of creatures and then attack. Clamp can help build storm. However, I don't think that Type One will see this as more than a casual card.
