Mohun Bagan's new signing Cornell Glenn struck the opening goal of the I-League in the fifth minute before completing a brace in the 21st, while Balwant Singh completed the rout eight minutes later as the title holders sealed the issue in the first-half itself.
The newly-promoted Mizoram outfit, cheered on by about 100-odd spectators, put up a full strength squad with Alfred Jayran as sole forward, but he failed to convert any of the chances and it was Mohun Bagan defender Pritam Kotal who reduced the margin with an own goal in the 17th minute.
Trinidad and Tobago recruit Glenn, who switched allegiance from Shillong Lajong, combined well up front with Balwant as Mohun Bagan were off to a flier with the former slotting home the opening goal of the 2015-16 season.
Glenn received an attacking ball from the left and the former Lajong forward converted it without any fuss to open his account.
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The early goal subdued the intensity of the second division champions who began on an attacking note with Jayran's impressive run from the left, and he had several raids into the Mohun Bagan box but failed to capitalise.
But four minutes later, Glenn restored parity by combining well with Balwant.
Balwant ran in from the left and set it up for Glenn who turned 180 degrees before shooting past AFC goalkeeper Soram Poirei.
Balwant soon opened his account as he beat the Aizawl defenders with his pace before firing in his right footer into the bottom left corner.
There was nothing much in the second half with both the sides failing to add anything to the tally.
Quero silenced the stadium with his double strike in a matter of few minutes when the Spaniard shot diagonally from the left with Debajit beaten by the pace of the ball.
With his partner missing a minute before, it was Norde who restored parity when he found an opening from the top of the box, beating three defenders on his way with his powerful delivery.
But once again, Mohun Bagan's defence crumbled under pressure as they extended their winless streak to four matches with their last win coming against Mumbai FC on March 13.
The draw meant it's an advantage for 2013-14 champions Bengaluru FC who are second placed with 26 points from 13 matches while their tomorrow's opponents East Bengal have 24 from 13.
Mohun Bagan, who now have 27 points from 15 matches, will be hoping against hope to retain the title as they face Bengaluru FC at home in their concluding round match on April 24.