Stronghold

If you have the following: Units that can use this synergy:
 * 2 Units: When an ally dies, the closest Stronghold unit will deal 30 additional damage until the end of the fight.
 * 4 Units: When an ally dies, the closest Stronghold unit will deal 60 additional damage until the end of the fight.
 * Gnoll.
 * Behemoth.
 * Orc.
 * Cyclops.