Check() is a Turn()-exclusive offensive Function that harms touched enemies while executing a Turn. It is one of the five Functions which are not directly derived from a Trace.
Check() is acquired by equipping Cull() in a passive slot, after which it is automatically planned when contact with an enemy is made. If Cull() is equipped as a passive upgrade to Help(), Friends deployed as a result of Help() can use an equivalent Function called Sic().