epithet
Explorer
The cloud of daggers ruling. The way I read that, it implies that I can position the cube in the corner of the square, effectively allowing it to cover 4 squares...which is a pretty tremendous power boost
The way we apply area effects is that a square (and anyone in it) is in the area if the effect covers half or more of the square. That means a 5 ft square area could cover half of two adjacent squares and effect both, but if the area were placed at the junction of 4 squares it would cover less than half of each square, and would effect no one (unless that creature were itself situated across two or more of those squares.)