This might be the most specialized off-map artillery in the game. Unlike all other off-map artillery, it cannot be called on any spot you like, but rather, it has to be centered on one of your own points or structures (e.g. a bunker.) To make up for this, it has a very short delay between the smoke warning and the when first shells fall. For a relatively long time, more mortar shells will fall around the point until the ability ends with one very strong circular barrage. Infantry squads that stay under this rain throughout the whole duration will nearly always be completely annihilated. On the other hand, they will be able to retreat with only one or two squad members lost if they retreat as soon as the first shell hits.