User blog comment:Neverworld/Champion Concept: Toth, Calamity Unbound/@comment-10958553-20131010201105/@comment-24024646-20131010202150

Thank you for your comment. The resource is build up the longer he stays in the Fog of War and not being seen by the enemy. This allows clearing fast jungle while not being overpowered when it comes to late game team fights or ganks. If he ganks, he loses the built stacks and uses the ability that makes more sense.

Three options: Use Q on the target to increase the duration of more damage receiving. This allows to a synchronization with his ultimate, dealing massive damage in short time.

Or using his W to slow enemies on bot lane, allowing the ADC and Support to secure the kill.

E can be uses to strike fast enemy targets with its range, dealing bonus damage with their missing health.

As every ability is useable without the resource, the resource itself is just a enhancer like Rengar's resource (Like you mentioned). The problem was with Evelyn, that she could be visible for the rest of its game, but she did burst enemy targets within seconds. I do want to make a challenging Concept, this includes to make it difficult and not easy-to-play. And this has to be also balanced.