Blessing of Potency is a Hemalurgic blessing for Kandra. This comes in the form of two metal rods in the kandra's shoulders (Hero of Ages pg. 347).

This blessing gives the user more than twice their physical strength and endurance. This leads to the supposition that the Blessing of Potency is given by iron rods, because of the nature of Hemalurgy. (Hero of Ages pg. 347)

TenSoon stole this Blessing from OreSeur when he killed him.

A koloss is the result of multiple Blessings of Potency being imbued upon a human.

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