Twinborn

Although you can't remember, your mother was due to birth twins. But something went terribly wrong and your twin died in the womb and you were born alone. During your youth you would hear a specific voice talking to you at times, calling you to play or warning you of danger. Over time you would learn to rely on that voice and realize it as a part of that same sibling you lost before you could even know him. The power of this bond gives you your magical talents as you and your sibling are residing in the same body. You offer your sibling experiences it can never possess and it keeps you safe. Together you can overcome anything!

Other’s Strenght

Starting at 1st level, you can draw power from the bond with your sibling.

You may add your Charisma modifier on all Arcana and Insight checks.

Inner Strenght

At 1st level, when you are reduced to 0 Hit points your sibling takes control of your body. Whenever you succeede on a Death Saving throw you may act normally that turn, falling unconcious at the end of that turn. You die as normal when you fail your third death saving throw.

Two of Them

Starting at 6th level, as an reaction, whenever you become a target of a spell or an ability you may use 3 Sorcery points, to delay the effects of that spell or ability for a number of rounds equal to your Charisma modifier. You suffer the effects at the end of the last turn of the delay. For example, if you have a Charisma modifier of +3 you would suffer the effects of the spell or ability at the end of your third turn after being the target.

Two Minds, One Body

At 14th level, you can use your sibling as a conduit for spells.

When you cast a spell with a duration of concentration you may use 6 Sorcery points to have your sibling maintain concentration. For the duration of that spell, you may cast another concentration spell and maintain the effects of both. Whenever you would roll a concentration check to see whether you keep concentrating on a spell you roll once for each of the spells you are concentrating on.

If you would loose concentration to one of those spells, you loose concentration to both.

Twincaster

Starting at 18th level, when you fail your third Death saving throw you make a Charisma saving throw against a DC 15. If you succeede on this saving throw, your sibling sacrifices itself for you. You immediatley gain half of your maximum hit points and you loose all of the special features of this Sorcerous Origin. You can reagain these features if a spell or ability that restores life is used on you to restore the soul of your sibling.