You can use this while in a mek and this make a dome

The M.D.S.M generates heat while active, and will also automatically deactivate once overheated.

While active, allies inside the dome will take 30% reduced damage. This buff is signaled by the presence of a aura of blue squares rising from them.

When enemies under the shield exit to the outside of the shield, they get 40% increased damage taken and 30% reduced movement speed for 30 seconds

Deactivating the shield does not inflict this debuff. This debuff is signaled by the presence of an aura of red squares rising from them.