Here's a closer view of Kamen Rider Accel's Trial Form! Boy, its sleek and definitely looks better than the concept arts shown earlier!
Here's more information about this really sleek form!
Trial Memory contains the memory of trial (challenges). It allows Accel to remove his heavy armors, making him into a lighter mode with sonic speed. As a result, Accel loses his defensive and offensive ability (at least by half), while giving him speed far exceeds normal Accel. However, since Accel Trial has the ability to strike enemy with uncountable multiple attacks at the same time with astonishing speed, it appears that he has a greater destructive ability than his normal form. It can be said that it is a form that "dances like a butterfly, stings like a wasp". Accel Trail can only be in his Maximum Drive mode for 10 seconds, when Time Over, the transformation will be forcefully removed.
So basically, its like Faiz Axel meets Cast Off. Cool. Expect this form to be seen on Episode 36 of the show.
Here's a closer view of Accel's Trail Memory.
Wait, there is a timer? is it me or Trial Memory kinda reminded me of Faiz's watch when he is in Axel Form.