Elder Sign
Can you use the base game Ancient Ones in Omens of Ice?
The designer answered this in 2016, and a community reply agrees.
- Samuel Bailey · Designer · 2016-06-20
- Scarlet Witch · Community · 2016-06-15
Yes. The rulebook's Ancient One requirement is about theme rather than rules, so any Ancient One works. You simply get fewer storm markers in play, which some groups offset with a house rule.