Necrozma Plating

Equipped creature gets +2/-2
The owner of Necrozma Plating controls
equipped creature and Necrozma Plating for as
long as Necrozma Plating remains equipped.
At the beginning of your end step you get a prism counter.
If Necrozma plating ever becomes unattached to equipped creature, transform it.

(Transforms from Necrozma, The Dark Prism)