Here is the description of Whirlwind attack: Whirlwind Attack - A godsend to a warrior surrounded, the Whirlwind Attack allows the fighter to strike at all nearby targets in one mighty spinning swing. Will not accidentally strike innocents, allies, or party members. However, I find that the attack does affect friendly summoned creatures such as Rising Colossus and Energy Vortex. This makes is very difficult to help out when in a group with magic users. For example: we are attacking a Dark Father, and the DF summons undead. I try to help out by whirlwinding the side spawn. It gets the spawn, but also suddenly makes the VE's and such attack me. Is this a bug? Because it is similar to attacking party members, in my opinion.