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Posted By: ValvorikIf "spirits" (as in bind the) is meant to include "ghosts" suggest that be clear.
Most importantly, "What you use is what you risk". We have a rule replacing the standard Injury/Exhaustion baseline for consequences of defeat with damage to whatever dice you were using in the conflict. As always, it's subject to negotiation.
For the public record, I'm totally cool with this and barely even consider it a rules mod. Since you can get the same effect informally without deviating from the written rules, formalizing it doesn't bug me a bit.