Editing Mnemon Explains Solar Combat (section)

====Ox Body====
This isn't worth spending a lot of XP on, but it doesn't hurt. It's particularly useful if you have a lot of soak, since each extra Health Level is probably three more minimum damage hits you can sustain. This is especially important if you're relying on being hit as part of your strategy, such as with Essence Gathering Temper or Snake Strikes the Heel tricks, or if you use charms with a Health Level cost.

It's almost always better to take the -1, -2, -2 option for this charm, but if you expect you may not have a lot of time to heal between combats, think seriously about the other options - a -0 that heals quickly might be more useful to you, especially if you're likely to spend it once a fight on a charm with a HL cost.

However, extra Health Levels are NEVER a substitute for an active defence.