Elisho's Dark Heavenly Spear:

If successful, target unit with HP and Morale, (including the ruler unit) gains the following effects during their next war, at the end of which this spell disappears: - Increase damage by 2 - Increase range by 1 - Gain +4 Attack (exceeds +4 cap) - Gain the Magical special trait - Each time this unit loses morale or HP, there is a 25% chance the unit cannot act during its owner's next turn, this is doubled if the unit is currently at or below half it's maximum HP, rounded up.