Pakistan wrap up the second Test against WI, bowling them out for 322 after Blackwood posted 95.
The home side win by 133 runs - largely thanks to Yasir's six-wicket haul in the second innings - and that takes Misbah's series win total to 10, and takes Pakistan's win-loss record in Abu Dhabi Tests to 5-0.
Yasir was on fire from the off, picking up his eighth five-wicket haul and second ten-wicket match haul in 18 Tests.
He removed Chase early on, before dismissing the aforementioned Blackwood, who fell five short of a hundred, and Jason Holder. Shai Hope and Devendra Bishoo briefly gave the tourists hope with an eighth-wicket stand of 45, but Yasir and Zulfiqar Babar took out the last three wickets in the space of four overs to seal the victory.