Sion shield buff idea
It should charge up in damage over its duration and you should be able to detonate it after 1 second
As far as damage goes it would have the damage it has now at 2 seconds and tripple that damage at 6 seconds.
Edit Ok the numbers are a bit off maybe up to up to 50% bonus damage depending on ow long its charged.
Or perhaps the flat damage part (including scaling damage) could increase with charge up to deal 150% bonus damage
Right now the flat damage part is 40 / 65 / 90 / 115 / 140 + 40% ap scaling