sousei ragnavein
創聖ラグナヴェイン
Cellphone/smartphone card game on GREE, developed by caerux.
All of its official art samples on pixiv have the copyright name "(c)創聖ラグナヴェイン/caerux" on the bottom-right corner.
See also
- Official site: http://www.caerux.com/ragnavein/info