Action: Ok, with the standard action he would have used last turn to break a bottle, Yezt puts his mace back and shifts the dagger to his main hand.
Next round: Yezt charges the zombie confidently, taking a vicious swipe with Morris' dagger in an attempt to sever it's head.
Confirmation, just in case- (1d20+3)
AC: 19 (-2 from charge)
1 essentia in wormtail belt, none in blink shirt