At a whopping nine mana this super sweet card just doesn't make the cut in most traditional Dragon lists, but this list can actually make enough mana through Ganax that casting one or two spells before finishing with Dragonstorm is actually possible
As far as going Naya, I see the thought process and I agree that the deck doesn't really need to be WURBG, but Galerider Sliver and Diffusion Sliver are pretty helpful so I'm not sure Snap157 on What are some affordable improvements 4 years ago for a sliver build I tend to focus on Venom Sliver plus Striking Sliver, with Sinew Sliver and Predatory Sliver being the core of the deck
against bigger creatures, they still punch above their weight class to trade with larger, more expensive threats
Ill talk about some of the lesser-known cards from this set, and where they might fit in the 99
Your opening hand is drawn before any turn, so you cant alternate cast a miracle card from your opening hand since miracle refers to the first card you draw each turn
You can only cast the adventure if you want to, provided that each time youll pay 2 more due to commander tax, so you can even use this card as a commander only for tutoring auras and equipment