I'm not sure I fully understand the chance cubes 100% correctly. The effect is self-explanatory, but the question is.

Can you gamble all your crates you collected during the mission or just one?

There is only one copy if "Chance Cubes" in the siüüöy deck. The card specifically limits it's effect to only 1 supply crate. Check the text:

At the end of a mission, you may discard 1 crate token to roll 1 blue die. If the accuracy result is 4 or higher, the heroes receive 200 credits.

If there were more than one of these cards, you could discard more than one token, but as it's worded now, only doable once per mission.

Thanks for the confirmation. I know it says one but it can be understood in a way that you could roll a die for each crate you sacrifice. The wording was very clear but whether or not it is an ongoing effect or one-use only was vague.

Thanks for the confirmation. I know it says one but it can be understood in a way that you could roll a die for each crate you sacrifice. The wording was very clear but whether or not it is an ongoing effect or one-use only was vague.

It would be worded

"discard X crates to roll X blue die"

if it would allow scaling.