It could be something like
Bloom-The blast radius from any explosion is greatly increased.
Catch 22- Double the boss health, double the chance for an exotic
Savior- All health is increased by 25%
Fragile- you are 15% more susceptible to damage, but give out 15% more damage
Pea shooter- you are 15% stronger but give out 15% less damage
More to come
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Reaper's toll - every death decreases your damage by 5%