The under-pressure trafficker, who is aged in his late 30s, has been the prime target of the garda's Operation Vulcan which led to seven arrests and 30 searches of homes and businesses in February.
He also has links to a gang who targeted the family home of RTE star Brian Ormond in a bomb attack last October.
Nobody was injured in that incident but officers now believe the thugs were targeting Detective Garda Michael Ormond -- a brother of the TV star.
The rival gang who want this man dead has strong links to convicted armed robber Paul Rice from Tallaght and inner- city hood Greg Lynch, who was busted with a huge haul of heroin when he was just a teenager.
"It is not just the cops that this fella needs to worry about -- some serious players want him dead," said a source.
The trafficker has barely any previous convictions and is being blamed by rival criminals for giving information to gardai.
Some of his junior associates are suspected of being involved in a bomb attack on the Ormond family home.
The terrifying attack took place late on last Halloween night when Mr Ormond's parents Jess and Mick were inside.
Officers now believe the motive for the attack was an attempt to intimidate Michael Ormond.
The trafficker's wife was arrested in February's massive operation and now his organisation is a major target for the Criminal Assets Bureau.
Gardai recovered around €30,000 in cash when they raided their Drimnagh home.
His gang has been highly active in criminality over the past five years and has been mainly involved in importing and trafficking large shipments of cannabis and cocaine for the home market.
However they are not directly linked to any gangland murders but are understood to have major contacts with Irish criminals based in Amsterdam.
Detectives scored a number of significant successes against the gang last year when they intercepted drugs shipments at Bettystown, Co Meath, and in Clondalkin, Rathcoole and other parts of Dublin.
In total, they seized 750kg of cannabis and 6kg of cocaine, with an estimated street value of €4.9m.
Sources say that his organisation is under "serious pressure" from the rival crew because they are "selling better quality cannabis and cocaine at cheaper prices."
"They also want their €100,000 back," the source added.
Garda believe that the rival gang with strong links to Rice and Lynch won't stop until they get either their money or their man.
In 2004, Lynch was jailed for eight years after he was caught with heroin worth more than €400,000.
The then teenager was spotted handing over the drugs to another man in the car park of the Red Cow Inn, Naas Road, Dublin on October 1, 2003.
Lynch (26), heads up a massive drug distribution network based in Dublin's south inner city.
Gardai believe he has taken over from 'Fat' Freddie Thompson as the biggest drug supplier in large parts of the city.