Replacement prop Ethan de Groot became the first All Black to be red carded at a World Cup as New Zealand crushed Namibia 71-3 in Toulouse.
Scrumhalf Cam Roigard and flyhalf Damian McKenzie scored two tries each in the lop-sided victory on Friday.
Roigard had his double inside the first seven minutes of his World Cup debut and provided assists in first-half tries by McKenzie and Leicester Fainga'anuku, and in the second half to David Havili.
The All Blacks scored 11 tries in all. McKenzie converted eight for a 26-point haul.
The New Zealand line-up wasn't second string but featured nine changes from the team which lost to France 27-13 in the first match of the tournament, including the new halves pairing of Roigard and McKenzie.
Both may need to be considered at least for bench roles in the All Blacks' top team later in the tournament.
Roigard showed a sharp nose for opportunities and, despite rain which sometimes was torrential in the first half, McKenzie kept the ball in hand more often than playmakers Beauden Barrett and Richie Mo'unga did against France when poor kicking cost the All Blacks. Aaron Smith replaced Roigard in the 66th minute.
The All Blacks had a dominant set-piece and scored one of their tries from a tighthead where they thrust the Namibia pack over the line from a five-metre scrum. New Zealand mostly targeted Brodie Retallick at lineouts, meaning not much was seen of Sam Whitelock, who equalled Richie McCaw's record of 148 Tests for the All Blacks.
They were expected to outclass their tier-two opponent but New Zealand will take heart from the fact they had a strong attacking focus, limited mistakes, and maintained reasonably good discipline until replacement prop de Groot became the first All Black to be red-carded at a World Cup.
Groot was yellow-carded near the end for a dangerous standing tackle and it was upgraded to red on review.
Roigard's first try came after only two minutes when Barrett cross-kicked for Fainga'anuku, who exchanged passes with Havili before handing off to Roigard. He was in again in the seventh minute when the All Blacks crushed the Namibia scrum and Ardie Save detached and passed to the scrumhalf.
McKenzie scored his first in the 20th from a quickly tapped penalty and pass from Roigard, and again in the 33rd when Roigard broke from a scrum on halfway and linked with his flyhalf.
Fainga'anuku also took a pass from Roigard and carried four defenders over the line for one of the All Blacks' six first-half tries. They led 38-3 at half-time.
De Groot ran strongly out wide to score the first try of the second half, 25 seconds after entering the field.
Dalton Papali'i scored after a deep breakout by Barrett, and Havili went over in the 57th, again off a pass from Roigard.
Winger Caleb Clarke scored from a kick by Mo'unga, and Clarke offloaded to set free Rieko Ioane on a long run to the line.
"Obviously we're delighted with the result and with the performance so that's a step forward," said All Blacks coach Ian Forster.
Foster said de Groot's red card was "frustrating" and suggested the All Blacks would be looking to draw a comparison with the challenge committed by France's Romain Taofifenua on Thursday, which drew a yellow card but was not upgraded.
"There's obviously a lot of shoulder on shoulder involved in that contact," he said, later adding: "People are searching for consistency at the moment, we'll just have to see what happens."