I like what Avid is doing here, but I think it can be pushed further. Right now we have self burn buffs and that's it. What about offensive burn? What about a mix deck? What about a real self burn deck that isn't running two cards and Guivre/Kasha?
First, one change I highly recommend is making Guivre go from Draw to On Play, and lowering the perm from 25 to 10/15. This would make it an actually good card to play in self burn while still maintaining the risk of buffing your opponents cards if they're running a DtH or something similar. This would make Guivre more consistent and viable to a self burn deck while Kasha is better in a mix deck, since it applies hefty burn but is only on draw for the buff
Below will be card ideas that toy with burn in ways that open up new avenues for deck building
Dizzying Discoveries
18
2 opponents Burning cards in hand Burn their value completely
Mythical Creatures
Your cards Burning in hand Snuff Out