The Duck in Duck Chess cannot be captured, and teleports mU. But it can be moved by both players, in addition to their normal move.
That actually is close to what my first thought was to do with the Portable Hole, except that moving it would be done as the normal move, and once moved it couldn't be moved again over the next two half-turns. If "neutral" (third-colored) pieces ever become a thing in ID/GC, I might just implement it that way.
That actually is close to what my first thought was to do with the Portable Hole, except that moving it would be done as the normal move, and once moved it couldn't be moved again over the next two half-turns. If "neutral" (third-colored) pieces ever become a thing in ID/GC, I might just implement it that way.