The body of light power doesn't revive you upon death in solo game. It just ends the stage.
I can't exactly remember the power's description, but I think the power gives 300% dmg boost and makes your hp to 1, and guarantees 1 revive?
Also, the power doesn't raise the damage of Snortoise Armor, too.
Steps to Reproduce
1. Start local solo game.
2. Earn the power "Body of Light".
3. Die.
4. The run ends.