A lot of my decks lack AoE which is kind of their Achilles' Heel. How do I scan my collection for AoE cards?
It seems that most AoE cards have either the phrase "all enemies" (if it will hit face) or "all enemy minions" (if it will only hit the minions).
As such, searching for the phrase "all enem" will bring up most of the AoE cards (and some non-AoE cards that deal random damage split among enemies).
Source: I just logged into Hearthstone on my phone for the first time in forever to test this.