The Big Lake
The Answering property can be added to melee weapons. There are two versions of this property; Greater and Lesser Answering.
Lesser Answering allows the wielder one free attack per round back against any enemy within reach who makes a successful attack roll against them. Note: the blow must actually connect, even if the damage done is somehow reduced to zero. This enhancement counts as a +2 bonus when used to calculate the cost of crafting.
Greater Answering allows the wielder to make a single free attack per round back at any enemy who successfully struck them during the round. There is no upper limit to the number of attacks that may be made this way. This enhancement counts as a +4 bonus when used to calculate the cost of crafting.