History: Villian is relentlessly aggressive, picking up probably 10 of the last 20 pots through betting nearly every time he is checked to and raising half of the bets thrown at him. None of his recent reraises have been called, but i don't suspect a card rush. I haven't been dealt much to combat him other than gapped offsuit cards, though i suppose i could've picked a better spot to make a stand than in the SB.

Hold'em No Limit ($1.00/$2.00)
Seat 1: ($142.00 in chips) (BB)
Seat 2: ($92.10 in chips)
Seat 3: ($200 in chips)
Seat 4: ($147 in chips)
Seat 5: ($198.45 in chips)
Seat 6: ($253.50 in chips)
Villian ($402.20 in chips)
Seat 8: ($249.15 in chips)
Hero ($318.80 in chips) (SB)

*** HOLE CARDS ***
Dealt to Hero [Tc Ac]
5 folds
Villian: raises $6 to $8
1 folds
Hero: raises $18 to $24
1 fold
Villian: calls $18
*** FLOP *** [8s 5d 4h]
Hero: bets $38
Villian: calls $38
*** TURN *** [8s 5d 4h] [Ad]
Hero: checks (maybe a mistake, though i suspect a flopped set trapping)
Villian: checks (not anymore!)
*** RIVER *** [8s 5d 4h Ad] [3d]
Hero: ? (???)

Extraction Time?
1). If so how much?
2). If not why and how do i play river?
3). What range of bets can i call?