Magic Detection

The magical person can examine another magical person and determine what magical abilities they have. The magical person must at least know of the ability perceived before detecting it (by witnessing in some fashion beforehand). This ability can be conducted at range with enough mastery at a maximum of 30 yards. In combat this can be used to detect your target’s weaknesses.
If the target has no abilities yet (manifested or otherwise), such as a baby, the caster can still detect that they "are magic" and can usually identifiy the number of abilities they will have - but which abilities will eventually manifest is not known.