Something we all missed.
C-3PO: "Once per round, before you roll 1 or more defense dice, you may guess aloud a number of {squigly} results. If you roll that many {squigly} results (before modifying dice), add 1 {squigly} result."
Yeah. I completely missed that too.
Based on the clarification above C-3PO's card really needs to be worded as:
"Once per round, before you roll 1 or more defense dice, you may guess aloud a number of {squigly} results. If you roll that many {squigly} results (before modifying dice), add 1 {squigly} result (before modifying dice)."
That comma makes apparent redundancy necessary.