A Legendary or Mythic 3rd trait that jumbles the board at the start of both players turns, or every 4-5 matches you make, or every specific colour matched by you. It would be a fun trait for a chaotic themed troop.
As for the skill, perhaps something heavily RNG themed, or maybe wipe the entire board and do something different for each colour gem for every 5 of them removed; a different buff or debuff to ANY random troop. For even less control and unpredictability, base it on the gems that replaced the board instead of the gems removed. If it’s risky enough to sometimes disadvantage yourself it could play to the whole chaotic crazy theme.
Got carried away, this is a trait suggestion.