Sigg said:This is kind of the reverse I was thinking of.....basically that cleave would make mirror image either useless or at least much less effective.
I don't ignore the word "creature", I just don't see where the use of the word "creature" implies exclusivity. It does not, in the feat description, state that the cleave feat can never be used against things other than "creatures". It also doesn't say in the glossary definition of "creature" that the feat Cleave can never be used against anything other than "creatures". It only states in the glossary definition that the word "creature" does not mean "object". It doesn't even say in the glossary that "creature" can't mean "figment"...in fact IMO the definition actually says it does mean figment when it says "or other active being" since a mirror image figment is an animate phenomina meant to exactly "mirror" a "creature" ("creature" being a "character" in this case).
What rule book are you using?
"Benefit: If you deal a creature enough damage to make it drop (typically by dropping it to below 0 hit points or killing it), you get an immediate, extra melee attack against another creature within reach. You cannot take a 5-foot step before making this extra attack. The extra attack is with the same weapon and at the same bonus as the attack that dropped the previous creature. You can use this ability once per round."