(yeah well deck happened to completely neglect the cause of heart crystals, so i think that he would've died as if he touched hellstone bricks in hell in terraria
and even if it wouldn't cause an injury that bad, the debuff would stop him from regen, so killing himself would probably be the best idea)
"Okay I'll just go back."
The hotland group(besides Azzouru and Razor) would probably hear Deck's footsteps.
"Hello again, mystery person that I accidentally killed."
"Okay, for the love of the Moon Lord, my name is Deck!"