I personally (caveat: not a playtester) missed the "Living" requirement on [mwcard=MWSTX2FFI06]Defend[/mwcard]; thought it was a great card for my Domination Necromancer until I realized it didn't work on my Skeletons, unlike most other "Command" spells that target friendly Corporeal creatures. Similarly, I missed that Badger Frenzy only works on Animal creatures; really wanted it to be a cheaper, instant-speed [mwcard=MW1I02]Battle Fury[/mwcard] for Minor creatures in Domination but then discovered I'd been breaking the rules using it with my Warlord to get double-tapping Goblins. Oh, and I tried to use [mwcard=MWBG1E04]V'Tar Force Sentry[/mwcard] to get my own Slow/Lumbering Zombies into position more efficiently before realizing that it only works on enemy creatures. Doh!