For example - if I create a level with a talisman that has two conditions, "Use only Fencers" and "Use no more than 4 Fencers", the talisman condition text on the level preview screen (and presumably the talisman list screen as well) is glitched, and simply says "Complete" (without listing any further conditions).
This is purely a bug with the displayed text explaining the condition. The actual talisman itself still works fine - it will be awarded when it should be, and not when it shouldn't.
Fixed in e650469, backported to V12.8 branch in d59b23f.
Basically - this was a case that it was trying to optimize, but I forgot to actually give it the text to use in such a case. It will now say "Using X or fewer <skill>s and no other skills" as of V12.8.1.