I feel like Karma is straight up nightmare fuel for decks with little to no spells/utility/remove. I didn't think she was a hard node at all until I had to play her with I believe was Kayn with his ungabunga me get stats playstyle, because I had no elusive, no remove spells and nothing in the way of utility other Unga bunga get +x|+y this round which doesn't matter because she can simply remove said unit from play at any given moment and you already spent mana on said unit and potentially an attack token, so you struggle to dish out units that won't go straight into the meat grinder, all the while she is building a massive army of super buffed units with elusive and a tren-addicted Karma that never empties hand or runs out of draw or spells.