Blocking Materials

 is a decoration.

It can be found in a Decoration Chest.

Trivia

 * is one of the few decorations to be in the game since its Initial Release on 17th March 2016.
 * The purchase cost was discounted to 10 during the Mother's Day Sale 2016 on 7th May 2016.
 * was the fourth milestone prize in the Shooting Stars Mini Event on the 16th May 2016.
 * was the fourth milestone prize in the Wizard Training #2, #3 and #4 Mini Event on the 25th May, 1st June, 8th June 2016.
 * lost its premium status (20) with the.
 * was added to the Decoration Chests since the until the.