[Lara]

Okay so you can't spawn guards because they delete themselves.
But even when in a guard zone, calling guards doesn't work
Even if being attacked by a troll

Mith, we'll need to investigate this.

[NirAntae]

Just to add info from my experience:

During the drakes invasion, I did call that guards (successfully) in both Drokkburg and Tarasinau. However, it seems like the way it works, they only show up *after* you are physically hit by something (sometimes twice), and only if it is within a short window of time after saying it. If it takes too long for the bad thing to hit you, they don't show up, and if you can't survive a hit or two, it won't do you any good.

[Lara]

Okay that was actually intentional, and I forgot about it.

Its not suppose to stop you from getting attacked, but rather come into help "later". This design was intentional for PvP implementation originally otherwise there would be no point to pvp in a guard zone ever.