Needs review
Source: Dragon Magazine #342

Description: You can drive back an opponent with the force of your ki.

Prerequisites: Ghost Strike Ability

You can spend one daily use of your ki power to perform a bull rush attack on an adjacent target (see Bull Rush). You do not, however, need to actually touch the target, nor do you provoke an attack of opportunity. You make a special bull rush check with a bonus equal to your Wisdom modifier + one-half your ninja class level. You may expend additional daily uses of your ki power to gain a cumulative +4 bonus on your check per daily use spent. You cannot move along with the target if you win the opposed check, but the target is still driven back an additional 5 feet for each 5 points by which your check exceeds your target's.