Right, so lecture time. In the various mats, it's made clear that Rule Breaker is an object created out of Medea's Divinity given form. Now then, sources are divided on who Medea's mother was, but all the options used are Oceanids, Daughters of the two Titans Oceanus and Tethys. Her father is always King Aeetes, the child of Heilos and an Oceanid.
Medea is full of divine blood, about as much as the second generation Olympians. It's somewhat surprising she isn't a goddess herself. I'm not saying she should be able to handle Tiamat, but she's got great heritage.