Krul admits the return of Ben Arfa has given the whole side a huge lift for the run-in.
And he reckons the French flier will become a Toon legend if he bags a derby winner.
Krul, 25, said: "He's our special player, he can make things happen and you could see that on Thursday.
"It's nice that he's back because it gives us an extra spark.
"You saw against Benfica he was close to winning the game for us.
"Hatem will become a legend if he scores the winner against Sunderland - anybody will."