How do I activate NIN's Shade Shift in PvP?

How does it work? Originally months back before they changed it, it was tied to the Bunshin skill and now it's not.

Though I occasionally see the stat buff on my NIN while playing PvP, though everything is chaotic that I miss it, but I don't know what triggers it and my PvP Profile tab doesn't list it anywhere which further adds to the confusion on what triggers it.

Does anyone know? I like to use it as it grants my NIN a shield PvP seeing as he can no longer stun or bind players anymore because of the changes.

Got removed, they did a 're-redesign' shortly after the 5.1 changes.

Bunshin no longer gives shade shift, bunshin is extra dps and resource generation now and the shield is now on shukuchi

So... the teleporting move is what causes Shade Shift buff to activate?

yes, you got 2 charges, 2 shade shifts
its one of SE move to combine mobility, offense and defense into one skill like for many other jobs, instead of splitting it up properly