Okan wrote:With DM supervised bindings with proper magic circles and contract negotiations, can we say that these alignment restrictions would not take place?
During the DM supervised actions anything the DM allows goes, and I can't see why they wouldn't allow you to call what you want. It would only be for RP though, you wont be able to mechanically take control of the creature.
If you call on a specific creature using its true name, the alignment restrictions are more relaxed, but it was still decided by admin ruling that good and evil shouldn't mix.