Name: FM
1st Power: Gateseal of Nullified Reality. Gateseals are magical sigils or runes, generally circular in design, that are branded unto the body of the user. These seals act as a link between multiple beings, and allow a sharing of power between the linked beings. In FM's case, he was linked to a powerful deity-class being that grants him a near unlimited amount of mana for spell creation and use. It also grants him a small sliver of its ability to disrupt reality.
Negative effects to 1st power: First off, the entity FM's gateseal is linked to? Complete and utter arse, as it slowly poisons his body and corrupts his mind with each bit of mana that flows into FM's body. Not only that, but it can actually use the link to take control of FM's form and use it like a puppet. Oh, and another downside to this? If FM channels mana through the link and doesn't use it, it escapes into the air as raw mana. Which is bad, very very bad. Since raw mana caused chaotic change in whatever it touches, and it's very difficult to undo the changes caused by it.
2nd Power: Hydra Blood. FM is infused with the blood of a powerful Hydra, which grants him several nice little perks. One, the Hydra can form from any part of his body as a single serpentine head at first. He can control it to a degree, but for the most part it governs its own actions. Two, the Hydra's blood fused into his grants him an enhanced regenerative ability, able to seal large painful wounds in mere hours. The Hydra head itself keeps the strongest trait of the regeneration though, being able to grow new heads after one is destroyed in some way not involving fire. Third, FM can channel his mana into the Hydra and use it as a sort of biological laser cannon.
Negative effects to 2nd power: Problem with this is that the Hydra is sentient, and driven to wipe out all forms of life other than itself. The fact that its bound to FM, and can't kill him without wiping out its own existence, really annoys it. To make up for this it usually rebels against FM's directions, and occasionally insults him and the people around him. Usually people nearby think FM said the insults, and react negatively. Which isn't so good for the dude (To say the least, he has issues).