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Discern Nature Spells and Effect Spheres

From Curious Pastimes Wiki

By default, any effect is assumed to rise from the sphere to which the equivalent spell normally belongs, e.g. the call Strike Down is assumed to be an elemental effect. If a call is accompanied by a different sphere, the effect rises from that sphere instead. Mechanical effects are as per the original call, but this may alter how the effect is interpreted (and how it may be resisted).

Effects with the Mundane call are not supernatural, and don’t show up to Discern Nature spells.

Examples
The demon Darnoth the Silent has the power to call Spiritual Mute. This power affects the target’s mind rather than their body, forbidding them from speaking for 30 seconds, and shows up to the spell Discern Spiritual Nature.

Note: Strength may be a corporeal or elemental effect, depending on the nature of the creature: an undead’s strength is likely to be a corporeal effect, while a demon’s would be elemental.