Every 10 seconds after battle starts, drop 2 [Buzhou Shattered Rocks] at random locations, dealing 80(200)% magic attack as skill damage to enemies in the area (only 10% damage to soldiers). When self takes lethal damage for the first time, all [Buzhou Shattered Rocks] on the field explode, again dealing 40(100)% magic attack as skill damage to all enemies within their area (only 10% damage to soldiers). [Buzhou Shattered Rock]: Obstacle; cannot be targeted by enemy basic attacks but can be targeted by skills. Enemy movement speed is reduced by 50% when climbing over the rock; ranged enemy basic attacks/healing performed from this location are negated by the rock by 20(50)%. The rock is destroyed after taking 3 instances of skill damage.