[Arryn]

Originally posted by Argitoth:
An enemy has casted Lure of the Deep (Global Enchantment).

To prevent the enemy casting this spell on you, keep your units 1 province away from a sea province, meaning, don't put any units in a province touching the sea.

Correction: You cannot "prevent the enemy from casting this spell". But keeping your units 1 province inland from seas will prevent losing units to the spell. You are immune to the effects of this spell in a coastal province if that coastal province has positive (ie, your) dominion in it.