- Xebec before dying used a forbidden ope ope no mi technique to share one nody with his soul, but in order for it to work the host must accept it which is why he chose Blackbeard
- Xebec knew he wasn't gonna survive
- 20 years later Blackbeard learned how to talk with the other soul through telepathy a form of voice of all things

- They came up with a risky theory since two souls inhabit the same body maybe it would be possible to obtain a second devil fruit, they started looking for the forbidden devil fruit yami yami no mi
- Xebec has absorbed the devil of the Gura Gura no Mi allowing Teach to use two powers freely
 
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