Episode 15 question: constraint on Shen Wei's powers

[china_shop]

When Shen Wei is explaining his power to Zhao Yunlan in ep 15 (timestamp 14:36), he says he's "restrained by Zhenhun token and black power itself".

Anyone know what he means by the Zhenhun token?

( Complete subtitles and screencaps of the Mandarin subs below the cut )

Lord Kunlun and Zhao Yunlan

[rheasilvia]

I posted a screenshot-enhanced theory on Kunlun and Zhao Yunlan over here. :-)

Beware: the post has massive spoilers for ep 34!