It was Boldy’s fifth NHL hat trick.
Robert Thomas scored short-handed for St. Louis to cut it to 5-3 at 16:00, and Dylan Holloway made it 5-4 with 15 seconds remaining with Joel Hofer pulled for the extra attacker.
Kirill Kaprizov had a goal and two assists, Danila Yurov also scored and Jesper Wallstedt made 20 saves for the Wild (5-2-1), who won for the third time in four games (3-1-0).
Robert Thomas had a goal and an assist, Mason McTavish scored and Cam Fowler had three assists for the Blues (3-3-1), who had points in three straight (2-0-1). Joel Hofer made 33 saves.
Jonatan Berggren’s power-play goal gave St. Louis a 1-0 lead 1:45 into the game, finishing top shelf on the backhand.
Boldy tied it 1-1 at 7:31 with a quick slap shot on a 5-on-3 advantage.
Yurov put Minnesota ahead 2-1 at 11:17, scoring from the high slot off the rush on a pass down low from Maxim Shabanov.
McTavish tied it 2-2 at 4:57 of the second period, but Boldy responded just 27 seconds later with his second goal to put the Wild back in front 3-2.
Kaprizov extended it to 4-2 at 8:47 with his ninth goal of the season. He passed the puck to Hughes, then went to the front of the net for the tip-in goal.
Boldy completed the hat trick at 16:47 to make it 5-2.
Quinn Hughes had an assist to extend his season-opening assist and point streaks to eight games. His assist streak tied Filip Kuba (eight games in 2008-09) for the second-longest run by a defenseman in NHL history. His season-opening point streak of eight games passed Andrew Brunette (seven games in 2009-10) for the longest in Wild history.
