Beckoning

[Gregstrom]

Originally Posted by Verjigorm

If a castle is besieged, casting the spell on that province targets the sieging force rather than the besieged force.

...unless you're the sieging force, of course. In which case most spells will avoid you (but not Leprosy IIRC - beware!).

TBH, I had believed that in the case of a siege where neither side involved was yours, the target army for ritual damaging spells like FFTS was chosen randomly.

While I've never used Beckoning, I don't think castles will provide any great protection.