Better Way To Identify Spies And Spy masters

[Frank_Stein]

If Spymaster #1 manages to implant Spymaster #2, that doesn't make Spymaster #2's mindslaves loyal to Spymaster #1, does it? I always thought Spymaster #2's mindslaves would remain loyal to Spymaster #2 only, and it would be Spymaster #2's responsibility to get his mindslaves in line with Spymaster #1's orders.

In that case, just make the box two tone, divided by a diagnol line when the spy master gets subverted. The primary Spy master gets the upper half of the box, the secondary master the lower half.