I’m a bit skeptical of your designs, not because they’re impossible to implement or uninteresting/not fun but because they go against a lot of important pillars of design.
Kua’lua’ki shouldn’t be a basic minion because of how complex it is and how strong it is against new players. Delirious Mists works only with Rush minions. Raging Rivers is extremely limiting for the design of Flow minions in the future. Delirium, Rage, and Trail ONLY function with Kua’lua’ki on the board, and they aren’t exactly game ending cards like you want them to be. What they DO do is turn all the Kua’lua’ki spells into pseudo-cantrips.
I’m all for alternate win conditions though, so keep the concepts coming!
Imo, the problem with using Warmasters as Bond targets is that each Warmaster represents a very different playstyle. Playing a Warmaster deck means trying to shove Provoke, Flying, Dying Wish and Ranged synergies into one deck, none of which are big keyword themes in the U’ami Coven.
Finally, the Grandmaster. I find this sort of design objectionable because it is incredibly frustrating for the opponent. It is also a card that can flat out end the game against decks that don’t have removal or strong minions below 5 mana, not pushing a board state, but limiting their resources for maximum un-fun-ness.
I’ll still keep your ideas in the back of my mind when designing the next expansion. Keep working on your concepts, you’ve got some great imaginaton!