It's interesting that all the cards have blood stains, but the last card changes the position of the stain from the bottom left to the top right.

Obviously, there's going to be some betrayal in this episode, and my theory is that Pomni, Kinger, and Zooble will be the traitors. I base this on the fact that the blood stains are on their teammates.
Pomni is overly excited, Kinger seems to lose control a bit, and Zooble might do so due to lack of options.

But it could also be the other way around, with Jax, Ragatha, and Gangle betraying their teammates.
Jax, being Jax, Ragatha might want to give Pomni the victory, and Gangle could use the typical strategy of pretending to be the most defenseless and then shooting her teammate.

Remember, betrayal always comes from an ally!