Drawmij's Beast of Burden

This spell partially lightens goods placed upon a single mount. The effective encumbrance of all objects on the mount, including riders, is reduced by half, in effect doubling the amount of weight the mount is able to carry.

A mount that suddenly finds itself carrying one-and-one half its maximum load without the spell's protection cannot walk, slowly sinks to the ground and stands a 50% chance of going lame. A mount suddenly burdened by twice its maximum load collapses to the ground, suffering 1d6 points of damage and automatically going lame.

The material components are a lodestone and pinch of metal filings.