All-Star Kelsey Plum lands in a new dimension and the Sky had to pay for it

A 12-point fourth-quarter swing separated the Mercury and Sky on Monday night, with Phoenix capitalizing on Chicago's mistakes. The trade deadline separated them even more: the Sky stood pat, while the Mercury swung for the fences. The Mercury landed the biggest name on the market, acquiring five-time All-Star guard Kelsey Plum from the Sparks for young guard Monique Akoa Makani, a 2027 first-round pick and a 2028 second-rounder. It marked just the fourth time in league history an All-Star was…