Forum member UnknownUser reports finding a never before seen 2011 LEGO NinjaGo promotional set at Bricklink. There are 98 pieces in this set and even comes with an exclusive Sensei Wu card!
LEGO NinjaGo 2856134 Scrinium is currently available for sale at this German site for €7,95. There’s also a description of the product which we have translated below.
LEGO 2856134 Scrinium
This exclusive LEGO Ninjago set includes a shrine to your favorite card. A map of Wu-Sensei is also included. Advice is from age 7 years.