[GAMEPLAY] Yorick ghouls AA won't proc thunderlord/luden echo

Yorick ghouls AA won't proc thunder lord/ luden echo.
Thunderlord: Hitting an enemy champion with an ability (ability damage) - Ghouls AA

1- Select thunder lord. 2- Select Yorick 3- Ghouls AA won't proc thunder lord/luden

how frequently: 100%.

Shouldn't it proc? Like zyra plants, heimer turrets?