this is a pretty rough concept. I just think Sona is a pretty poor excuse for a "bard" even if I love her.

Passive- Quicksilver Strings: The magical strings on Kelanor's lute cause his spells to mark targets for 4 seconds. The first ally (including himself) to deal damage to the target activates the mark, stealing 5/7/10% movement speed from them for 3 seconds. Hitting additional marked targets grants 1/4 of the original movement speed modifier per champion hit (maximum of 10/14/20% bonus movement speed).

Q- Clatterchord: Kelanor plays a dissonant chord on his lute that smashes into enemies and deals 70/100/170/200/270 (+65% AP) magic damage in a small AoE burst and lowers their armor and MR by 5/7/10/12/15% for 4 seconds (Cost: 60 mana at all ranks, 10 second CD)

W- Song of Solace/Piercing Scream: Kelanor sings a major scale that heals an ally for 40/55/75/90/120 (+35% AP) and for an equal amount more over the next 2 seconds (total base healed: 80/110/150/180/240 + 70% AP), If used on an enemy, he instead lets out a piercing shriek that damages the target for 40/55/75/90/120 (+45% AP) magic damage and for an equal amount more over 2 seconds (total base damage taken: 80/110/150/180/240 + 90% AP). (Cost: 50/65/70/85/100 mana, 15 second CD)

E- Fools' Lament: Kelanor plays a jaunty tune that gets stuck in an enemies' head, the target of this ability takes 70/90/120/170/220 (+50% AP) damage and is slowed by 20/25/30/35/40% for 3 seconds. If the target is already marked with Quicksilver Strings, the mark is consumed and they are instead stunned for 1.5 seconds. (Cost: 60/75/80/95/100 mana, 18/15/12/10/8 second CD)

R- Symphony of Awe: all enemy targets within a small burst take 200/250/300 (+70% AP) magic damage and are silenced for 1.75/2/2.25 seconds. Fools’ Lament deals an additional 40/65/80 damage to targets marked by this skill and allies steal double Quicksilver Strings' current movement speed modifier if they attack marked targets while they are silenced. (Cost: 120 mana at all ranks, 120/90/60 second CD)