New Zealand's Matt Henry and Ajaz Patel put on an unbeaten 88 for the last wicket to frustrate Pakistan Tuesday as the visitors reached 433-9 at lunch on the second day of the final Test in Karachi.
Resuming on 309-6, New Zealand added 124 runs in an extended session by lunch, with Henry on 56 -- his third half-century -- and Patel a Test-best 31.
The two-match series is tied after the first Test, also in Karachi, ended in a draw.
Naseem took the day's first wicket when he bowled Ish Sodhi for 11 -- a ball that cut through sharply and beat the batter completely.
Blundell, who was 30 overnight, reached his fifty with a boundary and a single off Abrar Ahmed. He hit six boundaries in his 51 before he was bowled by Ahmed.
The spinner then had Tim Southee stumped for ten, before Henry and Patel prolonged the innings, helping New Zealand cross the 400-mark.
Henry has so far smashed six boundaries and two sixes in his 59-ball knock.
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Agha Salman (3-66), Naseem (3-71) and Ahmed (3-142) were the main wicket-takers.