[OCG] Specifications for Structure Deck R: Lost Sanctuary

Yes there are Extra Deck cards

Product Specifications

◇ Set Contents
・ 1 Pre-Constructed Deck of 43 Cards
・ 1 Deck Power-Up Pack of 5 Different Cards
・1 Special Duel Field / Playing Guide

Pre-Constructed Deck:

1 Ultra Rare
5 Super Rares
8 Parallel Foils

Deck Power-Up Pack

1 Ultra Rare + 4 Super Rares, 1 of these 5 cards will be a Secret Rare

Source