euw.leagueoflegends.com/en/news/game-updates/patch/patch-82-notes#patch-targeted-spells
Riot is now balancing spells on a case-by-case basis to now draw minion aggro. There is no single metric they are using to choose which abilities do it to. There are single-targeted spells and AoE spells that are and are not included which leads me to believe that if an ability does draw minion aggro, the wikia should state so. It's a very important mechanic that will easily determine early game harassment and all-ins.
