I think that Warlock just survived the explosion of a star, but he has made chain reactions that are much more powerful than an atomic explosion via transmutation. Current Warlock could also bfr the heck out of Hulk... He is a beast.
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it's possible the karmic effects would put hulk down, but especially in this version of hulk, i wouldn't think so. can't recall off-hand who the blasts have ko'd.
Hercules never shrugged a Karmic Blast. Warlock was using force bolts from his soul staff. When he finally decided he had no choice but to go for a karmic blast Hercules side stepped the blast and grabbed his foot slamming him to the ground.
Thor only shrugged it off due to the various outside factors from, Odin tampering with Thor's soul, Thor being an Immortal Asgardian better fortified spiritually than a mortal, and finally being insane to the point the his madness was slightly effecting reality and his perception which Adam Warlock could see with his own eyes in the form of the Valkyrie.
Non of these factors can really be given to Hulk. >_>
aside from all this What is to stop Warlock from reverting Hulk back to Banner or into a baby like he did Man-Beast?
The Myth of Hercules able to withstand a Karmic blast needs to stop.