So Manaflow Band says the following:
Your next ability used has its mana or energy cost refunded, and restores 8% of your missing mana or 8% of your missing energy.
However, it feels kind of bad to have Manaflow Band up but not have enough mana to cast a spell even though it would be refunded anyway. What if it were changed to:
Your next ability used costs 0 mana or energy, and restores 8% of your missing mana or 8% of your missing energy.
sounds disgusting bet u main kassadin lol [sg-miss-fortune]
I would bet cold, hard, RP that all of that it has is an intended effect. Riot must have considered that, certainly because other things do have the 0 cost feature. I says it is because it is more readable and consistent, so a champion that has insufficient mana to cast a spell, cannot cast a spell and does not create a contradictory situation where a champion that has insufficient mana to cast a spell, may cast a spell anyway.
I can understand it's a bummer if it were to happen to me in such a situation, but I also understand it's a result of a fair design
I also wish it didn't trigger if you're at full mana.
Mana flow is already quite strong.
I think they wanna avoid that for certain champs (kass was already mentioned, kogmaw does the same thing.) and also for clarity sake. Going against someone who's clearly oom, but can still cast doesn't sound very fun. I think in that sense, it would just add too much hidden power. It feels fine right now. It promotes resource management, and if you aren't always spamming, you get more out of it.
Agreed
