With this spell It would act in some manner as a jump freeze spell but instead having the troops dig underground for a certain amount of time away from defenses. My first idea would be the dig spell would have the troops dig under walls and pop up on the other side. This would take longer than a jump spell because they are digging and it would cause the defenses to retarget because they cannot see those troops. The troops would immediately pop back up when the spell timer ends.My second Idea would be to have the troops dig underground and attack buildings underground while they are in the spell radius and could not be targeted until spell timer ends. This would give an advantage and disadvantage to attackers because their troops would not take damage but the troops not in the dig spell would now take damage from the defenses.
