New Zealand's No10s have already caused the British and Irish Lions trouble on this trip, whether it was Bryn Gatland, Stephen Perofeta or Ihaia West. Now it's the turn of Richie Mo'unga to inflict his own particular brand of discomfort on the tourists.
The Crusaders first-five, up against England international Owen Farrell, a man likely to wear the No10 jersey in the first test against the All Blacks at Eden Park on June 24, is a key man for Scott Robertson's team at AMI Stadium tomorrow.
If the Lions' performance in their defeat to the Blues is anything to go by, he will have a wave of red jerseys in his face for most of the night as the tourists attempt to shut down him and the Crusaders midfield of David Havili and Jack Goodhue, but, as assistant coach Leon MacDonald said today, Mo'unga, still only 23, has the requisite ice in his veins to flourish regardless.
It is kicking game which perhaps could cause them the most worry, but he also has the hands and feet to cut uncertain defensive lines to shreds, all attributes which have helped his side maintain their unbeaten run this season.
And, in statement which perhaps might send a chill down the spine of those Lions supporters who can remember the way Dan Carter dominated the test series 12 years ago, MacDonald said he could see a lot of the former Crusader in the incumbent.