But Auckland's last wicket stand held firm for the final five overs, and the Aces ended the day at 250-9.
The wickets also tumbled at Nelson Park in Napier, as Wellington and Central Districts shared the honours on day one.
After being sent in by Wellington captain Grant Elliott, the Stags got off to a flying start, with Peter Ingram and Jamie How putting on 136 for the first wicket. But in the third over after lunch, How was run out for 46 by Wellington youngster Harry Boam, triggering a collapse which saw the Stags lose seven wickets for 44 runs.
Debutant Scott Kuggeleijn was the chief destroyer, taking three quick wickets to expose the home side's middle order.
The exception to the day's play came in Rangiora, where bat dominated ball and Canterbury lost only four wickets on their way to 286 at stumps.
Rob Nichol notched a ton after opening the batting for the Wizards in the all-southern encounter with Otago.
Nichol's opening salvo was ended on 107 by English international Steven Finn in the first over after tea but, by that point, Canterbury were in control, and the late loss of Shanan Stewart for 61 barely took any gloss from a solid day at the crease. Teenagers Tom Latham (40no) and Henry Nicholls (6no) saw Canterbury through to stumps, setting them up for an imposing first-innings total.