SRD
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Here's how I think it could work:
1) Wailing Cry (Banshee) vs. Unholy Word (Harbinger)
2) Death Strike (Banshee) vs. Grievous Grasp (Harbinger)
Added after 12 minutes
Wailing Cry for the Banshee is an alternative to Grievous Grasp for the Harbinger of Death (this is their difference).
The essence of Wailing Cry: Banshees stand, and enemies stand nearby. The Banshee unit uses this ability, and all units within a 3-cell radius take damage and do not counterattack. The damage is greater the more Banshees there are, the closer the enemy, and the lower the morale of the enemy units.
Calculation: Number of Banshees * (10 - Morale) - for the first row, twice as much for the second row, and decreases further for the third (last) row. Let's say you have a Dread and the enemy has a Fear Aura, and skilled leadership, and we have 50 Banshees, then the first row in a circle will receive: 50 * (10 - (2 + 3 - 2 - 6)) = 650.
1) Wailing Cry (Banshee) vs. Unholy Word (Harbinger)
2) Death Strike (Banshee) vs. Grievous Grasp (Harbinger)
Added after 12 minutes
Wailing Cry for the Banshee is an alternative to Grievous Grasp for the Harbinger of Death (this is their difference).
The essence of Wailing Cry: Banshees stand, and enemies stand nearby. The Banshee unit uses this ability, and all units within a 3-cell radius take damage and do not counterattack. The damage is greater the more Banshees there are, the closer the enemy, and the lower the morale of the enemy units.
Calculation: Number of Banshees * (10 - Morale) - for the first row, twice as much for the second row, and decreases further for the third (last) row. Let's say you have a Dread and the enemy has a Fear Aura, and skilled leadership, and we have 50 Banshees, then the first row in a circle will receive: 50 * (10 - (2 + 3 - 2 - 6)) = 650.