Bugbear Strongman

Notes:
 * He has about 4800 HP.
 * Located around I-11, J-11, or I-9.
 * Lottery pop of Bugbear Bondman.
 * Seemingly random spawn times - some have seen him pop 15 minutes after he was killed, others have searched 3 hours and got no pop at all.
 * Killable solo at level 65.