|This Craft Essence is a limited Craft Essence. It was only available during special summoning campaigns. No plans have been revealed to add this Craft Essence to the permanent summoning pool.|
This Craft Essence is available during the Chaldea Boys Collection 2016 Event.
- This card seems to be a pun on the popular Uta no☆Prince-sama♪ series. Siegfried's voice actor, Suwabe Junichi, also voices the character Jinguji Ren from Uta no☆Prince-sama♪. Likewise, the way Sasaki is illustrated in this card is similar to Hijirikawa Masato, Ren's roommate and rival in the series.