Unexplainably a contract written in your native language has appeared in your room. It offers power at no apparent downside. Won't you sign and claim what is yours?

Shake My Hand: In a moment of desperation, you can psychically shake my hand and allow me to intervene. When you fail an attack roll or ability check you may use your reaction to roll 2d6 and add it to the roll possibly turning a failure into a success. You may use this feature once per short rest. 

Buy Time: Death? Not when I'm around. If you take damage that would reduce you to 0hp, you may drop to 1hp instead and immediately teleport in a plume of blue fire up to 30ft to an unoccupied space you can see. If you do this the Wshmakyr's Contract is unable to be invoked for the rest of the mission.

Notes: willing signer