Bonus Physiology:
Silican Physiology: You have evolved in an ecosystem which used Silicone rather than Carbon as the building blocks of life. Your body appears to be build of stone, which doesn’t make you the most agile of creatures, but you certainly are sturdy.
Ability score increase: Your constitution is increased by 2
Age: You mature and age very slowly. Your species does not reach maturity until they are 200 standard years old, and some of your people have been known to survive for thousand of years.
Life, but not as we know it: Because you have a completely different biology from carbon based life forms, you are incompatible with them – you can’t eat their food or drink their beverages. You don’t need to breathe, however you must periodically ingest or inject some form of sulfur to keep going. Your regular food must be silicone based.
Speed: You are somewhat slower than average – your base speed is 25
Natural defense: Your have a natural AC of 17, but you can’t wear standard armour.
Living Encyclopediae: Because of your long life, you have already accumulated a lot of knowledge. You have advantage on Science skill rolls when recalling information.