Kamen Rider Ryuki is also one the Kamen Riders that uses Advent Card for fighting apart from Kamen Rider Decade (the Pink black kamen rider), For the Kamen Rider Ryuki Series, it all started when Thirteen Advent Card decks were created for thirteen Kamen Riders (i have here only two of them) They make Contracts with monsters from the mysterious Mirror World, a parallel dimension opposite to our own in which only the Kamen Riders can exist. The Riders draw on their monsters' strength in exchange for feeding them the life force of the creatures they destroy. The creator of the Advent Cards has only one rule: that there can be only one Kamen Rider. The others must be killed, and the sole victor will be granted a single wish, which leads to a conflict known as the Rider War. (source from wikipedia)
Here they are Kamen Raida Ryuki and Kamen Raida Naito (thats what they call in Japanese)
Ryuki's Henshin Belt! 
Kamen Rider Knight
Impressive Detail just look at the Henshin Belt, whereas the articulation is not as great as the S.I.C's, price? roughly around $16 per Figure
