This page shows in what ways Dekker is weak against Feng Mao. Or in other words what actions should Dekker do to receive minimal damage from Feng Mao. Note: any hero isn't always strong or weak against another one. It depends on many different factors so please keep that in mind while adding your tip.
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Feng Mao's ultimate is broadcasted very obviously and he's only going to use it when he's in your face, save your stun to interrupt his ultimate at point blank.