The V Jump Spring 2015 subscription bonus is a set of two Ultra Rare promotional cards, "Kaiser Sea Snake" and "Junk Breaker". It was mailed to people who subscribed to V Jump between March 19 and July 18, 2014. People who received this bonus had also received the V Jump Fall 2014 subscription bonus.

No Effects Yet. But Here we can see the Manga images  of both:


Kaiser Sea Snake


[OCG]Jump Spring 2015 subscription Cards KaiserSeaSnake-EN-Manga-ZX-NC



Junk Breaker

[OCG]Jump Spring 2015 subscription Cards JunkBreaker-JP-Manga-5D

You can Tribute this card in order to negate the effects of all monsters on the field