Power broke a 2-2 tie at 3:03 of the third period. Thompson skated the puck into the offensive zone, drew two defenders and dropped a pass for Power, who beat Ersson past his glove. Power, the No. 1 pick in the 2021 NHL Draft, had not scored since Feb. 18. He extended his point streak to four games (one goal, three assists), his longest in the NHL.
"I was coming in late and [Thompson] just kind of dropped it and I had quite a bit of time to just walk in and shoot it," Power said. "I was lucky enough it went in."
His first goal last season, also a game-winner in a 3-2 overtime victory against the Dallas Stars on Jan. 23, came in his 43rd game. This season, his first came in his 10th game.
"Getting it a little earlier than last year," Power said. "Now you don't really have to worry about it and you just go play. They seem like they're easy to come by when you get your first one out of the way."
Luukkonen preserved the lead, making 20 saves in the third period, including against Garnet Hathaway on a 2-on-0 rush with 13:37 remaining.
"That's a big one, there's no question," Sabres coach Don Granato said. "And you're on the road, too, so you keep the crowd out of it when he makes that save."
Farabee gave Philadelphia a 1-0 lead 55 seconds into the first period when his centering pass for Bobby Brink went in off the stick of Buffalo defenseman Henri Jokiharju.
Casey Mittelstadt scored from the slot to tie the game 1-1 at 3:38.
Biro put the Sabres ahead 2-1 at 10:00 with his first NHL goal in just his second game. He was recalled from Rochester of the American Hockey League on Tuesday and was playing his first NHL game since Feb. 23, 2022.
"Obviously it's been a long road to get here," the 25-year-old said. "To finally get one after a long time ... I haven't played [an NHL] game in almost two years. It's definitely been a grind to get here and just a weight off the shoulders."