Your right blast cauldron-born IS something to do with a magical cauldron as well as a battlemech, but instead of healing someone it was used to resurrect the dead into zombie-like warriors in Lloyd Alexander's series of fantasy books The Chronicles of Prydain.
PS: just to be clear I took my name from the mech' NOT the zombies!! But if you and your ZS team try hunt me down you'll have to contend with one or two of my walking tanks