User blog comment:B214/Question & Answers 5/@comment-98.227.238.52-20150513171226/@comment-26345952-20150513173604

Difficult and dangerous yes. Very little chance for that to succed, but Issei has always been a person of opportunities and miracles, so if presented it could be possible.

And remember that Issei fused Albion's power to his BG and managed to live by taking out a huge chunk of his lifetime, so it can be possible, but at a high price for both of them.