Terry won the Premier League title five times at Stamford Bridge and is now Villa skipper.
The defender, 37, who will get a £2million bonus if Villa go up, has made 26 Championship appearances this term.
Bruce admitted: “His name on the team-sheet certainly helps us.
“He will be good for us I am sure in the remaining games.
“He is unquestionably our biggest name.
“When you are the biggest name you have to perform to the levels and certainly John has done that all his career.
“The more you have of them the better.
“The reason I brought them here was not just to handle big games but to handle Aston Villa.
“They have done that fantastically well all season."