Champions with true damage:
Ahri (Q)
Amumu (passive)
Aurelion Sol (E execute)
Bel’Veth ®
Camille (Q)
Cho’Gath ®
Darius ®
Draven ®
Fiora (passive + R)
Gangplank (passive + R)
Garen ®
Gwen (Q)
Kog’Maw (passive)
K’Sante (passive)
Lillia (Q)
Master Yi (E)
Olaf (E)
Pyke ®
Rek’Sai (E)
Sett (W)
Syndra (W with fully stacked passive + R execute)
Twitch (passive)
Urgot (R execute)
Vayne (Q)
Vel’Koz (passive)
Yone (E)
Zoe (E)
For me any mage that has true damage on an ability (Lilia, Zoe, Gwen, Ahri) sounds wrong.
I’m not saying these champs are too strong, it just doesn’t fit them.