PLO $200 Fullring Riverline

[darkcore]

MP: hero ($222) Q[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/heart.gif[/img]
CO: villian ($215) new to the table, no reads.

preflop: 6 players limp

flop ($12): Q[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img]
checked to hero who bets pots and it is heads up with villian.

turn ($34): 7[img]/images/graemlins/heart.gif[/img]
hero pots, villian calls

river ($100): 5[img]/images/graemlins/diamond.gif[/img]

hero ???

i don't really like this card. with villian calling down i don't think he has the nfd or a set. maybe a low flushdraw, maybe some kind of wheel draw, maybe some combo. what's my best play here?
bet and fold to a re-raise?
check to make him bluff his missed draw and call?