Talk:Champion ability/@comment-24065850-20131018155902/@comment-24200857-20170309043548

It's a bit of a weird case with channeled abilities because nothing is moving but all damage is calculated on-hit, rather than on-cast or on-channel-completion.

You can also level up an ability to gain extra damage when the ability hits (if the ability hasn't hit yet); resource costs and cooldowns won't be affected as they are calculated on-cast.