User blog comment:Shaw Fujikawa/Custom Champion Revisit - Arvice, the Wandering Psychic/@comment-5638912-20121123021558/@comment-5638912-20121123192951

But his cooldowns are too low, he will always have mana to cast his abilities, he'll never run out of it.

For example: And about his ult, do his basic abilities have costs when R is toggled on? Cause it says his abilities will restore mana equal to the damage done by them. So, if they actually cost the mana percentages, you would be losing mora mana using them, than restoring for the damage dealt.
 * Q costs 10% of max mana, with a 3 second cooldown and passive regenerates 5% per second. After 2 seconds of using Q, you will have the full mana cost refunded.
 * W costs 15% and has a 3 second cooldown too. By the time the ability is available again, he will have the mana he used, back.
 * Same goes to E, 10% and 5 seconds. He will regenerate 10% more mana than the one he used on this ability by the time it goes out of cooldown.