Oscon's Fortress Level IV - Spoilers
The statue's names are Scissor (east), Rock (south) and Paper (west). 

Oscon's Fortress Level IV - The Death Snare
Name the three statues and have them join the party. You will need three empty slots, obviously. Put Rock in the first slot, Paper in the second and Scissor in the third. Go to the magic mouth at 17n/11e to activate the magic doors in the statue alcoves. 
The little spiel that the magic mouth gives you just translates into "The segment is behind Rock's alcove." It's on the map anyways... 
