4 corner squares become Sentinel guard posts. When a Sentinel is there, it becomes a Watchman. Improved tiles from Watchman attack the first target. When hit, it receives a mark that increases the damage taken by the improved tiles of the Sentinels of 15 %. The damage bonus cannot exceed 300 %.

2 central squares adjacent to the road become Sentinel guard posts. Damage from Sentinels' upgraded tiles increases by 20 % when a Sentinel is placed or appears in a guard post. Damage bonus increases to 35 % after placing a Sentinel in a guard post 9 times. The squares are moved every 15 s.

A Sentinel placed in a guard post To 40 % chances of shooting 2 additional enhanced tiles on random monsters.

Whenever a Sentinel occupies a guard post, the attack speed of all Sentinels increases by 50 % for 10 s. If a Sentinel receives a bonus during this period, the effect is extended by 10 s and the attack speed bonus increases to 100 %.

Improved tiles from Sentinels placed in the guard posts become explosive, inflicting area damage and shattering 15 % of enemies' armor within a small radius around the point of impact.

The Sentinels' improved tiles have 5 % additional chances to inflict critical damage.

A Sentinel equipped with a ballista To 20 % chances of appearing on the field. This Sentinel's upgraded tiles inflict 200 % additional damage. Each Sentinel fusion triggers a ballista shot. Ballista shots inflict guaranteed critical damage; the number of targets is proportional to the fusion rank of the Sentinel equipped with a ballista.