Tour De Force is an Empowerment ability that Chamber has to equip before using Upon casting, he will summon a sniper rifle. Chamber can unequip and reequip this rifle with a shorter equip time for the rest of the round.
If Chamber kills an enemy with Tour De Force, a a temporary slowing field will be created on the ground under the victim's position. If the target is high enough above ground when they are killed, it is possible for the slow field to not be created at all.