As the daze spell, except as noted here.
This enchantment clouds the mind of a humanoid creature with 4 or fewer Hit Dice so that it takes no actions. Humanoids of 5 or more HD are not affected. A dazed subject is not stunned, so attackers get no special advantage against it.
For every additional power point you spend, this power can affect a target that has Hit Dice equal to 4 + the additional points.