Red-Eyes Slash Dragon Effect doesn't work when Donpa is targetting it. FIX IT Please. Lost so much battle even if it clearly mention "Target" in both card's description!
Common problem is maybe like this: a fur is summoned -> donpa skill activates and target slash -> trigger wiz skill to gain LP ... and cause it's already chain 2 the time for slash skill to trigger and negate is missed, even if it have a equip. It happened to me a lot