Seraph, Stage 1

Boons: 

• Celestial Form. Your Wisdom score increases by 2 and your Constitution score increases by 1. An ability score cannot be increased beyond 20 this way. Your creature type is now Celestial, instead of what it was previously.
• Angelic Wings. You have manifested feathered wings. You have a flying speed equal to your normal speed. You cannot wear armor or clothing that has not been modified to accommodate your wings.

Flaw:

• Planar Binding. Your body and soul are bound to a divine plane of existence. You have disadvantage on death saving throws as the plane attempts to pull you back to it. If you would be killed, your soul has been taken back to a plane of existence of the GM’s choice. This plane is your new home, and you become an NPC under the GM’s control. If you are on the divine plane responsible for your transformation, this flaw has no effect.