Mighty swing: Starting at 4th level, the war hulk can make mighty swings. A mighty swing is like a great swing except that it is an attack action rather than a full-round action. Thus, the war hulk can move and make a mighty swing or (if he can make multiple attacks) make multiple mighty swings in a single round.
Great swing: Starting at 2nd level, the war hulk is able to make a great, sweeping swing with a melee weapon. In melee, as a full-round action, the war hulk can choose three squares adjacent to each other (he must threaten all of them). His attack applies to all creatures in those squares. Make one attack roll and apply that roll as an attack against each defender. If the war hulk rolls a critical hit, only the first creature suffers the critical hit.
Walls and similar obstacles can block the great swing. Start with one square that the war hulk threatens. Each successive square chosen must be adjacent to the previous square and have line of effect from that square. Two squares separated by a wall, for instance, can't be chosen as adjacent squares for the great swing.
The war hulk may skip creatures, attacking only those he wants to. For example, if there are three creatures in a row -- an enemy, an ally, and another enemy -- the war hulk can choose those three squares for the great swing but strike only the enemies.
If the war hulk drops one of his foes with a great swing, he may cleave normally. However, he may cleave only once for every time he swings, even if he drops more than one foe.
If the war hulk deals sneak attack damage, it applies only to the first creature struck with each attack.