Homebrew Crystallines Species Details

They are humanoid creatures that have crystals on their right arm and partway down their shoulders and back. They where created deep in the earth, almost near the core of the earth. Their crystals are immune to Fire, water, earth(Except Diamonds), air, acid, poison, and piercing. They where created when An ancient race dug down into the earth and found living crystals. Over time they learned how to harness the crystals power and be came the crystal city. A city so far ahead of the world that they where treated like gods and became the peak of society. But eventually they started using the crystals to create super warriors. the testing majorly backfired and created everyone in the city into Crystallines. The shock of the energy sent a blast straight to the core of the earth where the city fell and have been stuck their every since. The shock created such a mess that Tyr the god of justice and locked them into the whole until recently when the people found a way out of their prison of a home by making the stairway to heaven(a challenge that decides who can leave and who can't.) This way it sorts through who is ready to leave and who needs to learn still. 

Crystallines Traits

They are part crystal humanoids who are good for constitution and dexterity.

Crystal fury

You go completely crystal and you become stronger. Once a day you can go into a complete crystal form where your armor class becomes 15 + your dexterity modifier. it lasts until you are out of initiative or if not in initiative it last for 1 hour and a half.

Crystal shield

You create a crystal shield that push things away and protect you for 10 minuets

Crystal Creator

AT 6 level you can create small trinkets out of crystals

Growing Shard

starting at second level you can control the crystals on your arm making them grow up two 2 inches longer than they already are.

Shard Shock

you send a volley of crystal shards at something

Dome of protection

You create a crystal dome around you in a 15ft radius that can't be broken and last for an hour but is exhausting to use