Deathfire Touch Not Registering On-hit Effect Abilities/Spells
It states that "your damaging abilities" will proc the keystone effect, but I just played a game as Ezreal and his q wouldn't proc the effect. I'm just assuming it's cause the game is programmed so that the q is considered an on hit effect attack (as to proc sheen damage and stuff) but it's not giving the burn over 4 seconds which is kinda eh cause his q is an ability and it's a skillshot as well. The extra reward from a skillshot ability such as Ezreal's q landing is kinda important.