BB checks, Hero UTG to act

Multi-way Flop | 3-way: UTG | 100bb effective | Difficulty: Standard

Players in hand: Hero (UTG), BTN, BB

Hero hand

A♣K♠

Board

K♦9♣4♠

Action so far:
3-way pot 8bb on K♦9♣4♠
BB checks, Hero UTG to act

Pot: 8bb   To call: 0bb

Villain range: BTN/BB ranges: pairs, weak Kx, suited connectors, gutshots

Your move: