Any tips on how to kill Dark star Dragon in 30 seconds?

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dasdaadaa
Pit Knight
119 | 1
I have 3 sec blink (Paladin) and 26k damage but still can't succeed.
felix0808
Pit Knight
116 | 12
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Also had the same problem. It is turned out there is a shortcut exists, you need to blink down through void in nearly beginning, while i was going on top path until crossroads
CaoBao
Bone Archer
72 | 4
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Harbinger, Pounce. Probably few more skills that help.
dasdaadaa
Pit Knight
119 | 1
thx guys, i beat it