Hypnotic Specter - yes
Hymn to Tourach - the AI refuses to play it I you have
Wilt-Leaf Liege in hand but it otherwise works
Smal
Pox - Yes
Shrieking Grotesque - The first time in the game it worked then second time it didn't, unfortunately I didn't save the game
Pox - yes
Coercion - crashes the game when
Wilt-Leaf Liege is in opponents hand, sometimes it crashes right away and sometimes you can get to choose what to discards
Liliana Vess - yes
Blightning - The first one played put one into play and the other in the graveyard, the other
Blightning that followed put both Liege's into play
Ravenous Rats - yes
Stupor - one gets put into play while the other is put into the graveyard
Mind Rot - the first one is put into play while the other is put into the graveyard
Mind Twist - I played it for six and 3 lieges were put ino play while the others were put into the graveyard
I uploaded the decks that I've been testing with and also 4 save games I made. I tested the cards by giving the AI a deck with 60 lieges while I played a discard deck I had and used debug mode to grab cards I need. I play on Windows 7 Ultimate. I don't know anything about coding but could the liege maybe be coded in such a way that when it goes into the graveyard that it checks if he was put there from the hand and if it was that it goes into play. It wouldn't be perfect and I don't know if it's possible but maybe it could be a good aproximation. Something in the line "when
Wilt-Leaf Liege is put into your graveyard from your hand return it to the battlefield". It would trigger when you would discard it yourself but that wouldn't be a problem unless someone would exploit that on purpose.