think there will be many spells of pakistani bowlers coming in and deserving so...but mine goes to javagal srinath, in a test match against south africa in 1996...where S.A were chasing 170 to win in the last innings, and were 65 for 3 at one stage, there the ball started reversing for srinath...and south africa got all out for 105...
here's the link...
Javagal Srinath 6/21 vs South Africa 1st test 1996/97 Ahmedabad - YouTube
here's the link...
Javagal Srinath 6/21 vs South Africa 1st test 1996/97 Ahmedabad - YouTube