The PCs find the schema. They also find a duplicate of the schema, an eldritch machine that House Cannith used to destroy Rose Quarry, and what must be a creation pattern that makes use of the first two schemas the party has recovered.
But what about the doors in Whitehearth that the PCs didn’t find keycharms to? And what’s up with this creation pattern – there’s room for two more schemas?
As the PCs leave Whitehearth, pondering these questions, Garrow unleashes the trap he has set fot the party.