User blog comment:Lykrast/Dangih, the venerable soldier/@comment-4290320-20130826153615/@comment-5686533-20130826155118

What should I explain ? You can have up to 100 Momentum, that regenerate at a rate of 1 per 0.4 second, meaning that it takes 40 seconds to 0-100 it, and damaging at least one enemy champion with Unstable Magic will gives some Momentum. When it reach 100, you can consume it to cast his "false" ult Charge.