i fell so sad...... but i hope our member dont get ruling error-_-
first, after he draw by dark world dealing, did he discard?
ok, so you mean... he activate dark world dealing, he and you draw 1 and discard 1 card, then he reveal 5 hand without draw 2 card by appropriate???
if like this...., he win-_- appropriate activate by create a new chain, since the dark world dealing is chain link 1, after all chain resolve, he win by exodia already(appropriate already no need create a new chain to resolve, chain for exodia to complete(dark world dealing) already resolve completely,
my question is, did he discard? well, if he already discard-_- then he is right( sorry to say this)