You don't gain Exhaustion levels from dehydration, malnutrition, or suffocation.
You gain one skill proficiency and one tool proficiency of your choice.
You don't need sleep, and magic can't put you to sleep. You can finish a Long Rest in 6 hours if you spend those hours in an inactive, motionless state. During this time, you appear inert but remain conscious.
You gain a +1 bonus to your Armor Class. In addition, armor you have donned can't be removed against your will while you're alive.
You have Resistance to Poison damage. You also have Advantage on saving throws to avoid or end the Poisoned condition.