He should have left home without it.

A New Jersey man who launched a perk-filled membership card for millenials — modeled after the posh American Express black card — is being sued for turning a West Village building into an “Animal House,” according to a lawsuit.

For a $250 annual fee, Billy McFarland’s “Magnises” card is a wannabe version of the elite, invitation-only American Express Centurion Card, which has no spending limits and is made of black titanium.

Magnises members get a black, metal membership card with a magnetic strip on the back as well, but that’s where the similarities end. The card can be linked to credit or bank accounts, and members get discounts at restaurants, stores and special events.

Perhaps the biggest benefit for cardholders was the free booze flowing at parties at a 22 Greenwich Ave. town house, where 500 guests once showed up for celeb shutterbug Patrick McMullan’s birthday party in 2013. But the party-pooper owner of the $13,750-a-month duplex wasn’t thrilled.

McFarland hosted numerous “blowout parties” and “maliciously vandalized” the space, causing more than $62,000 in damage, the lawsuit claims.

McFarland, 23, a Short Hills, NJ, native who dropped out of Bucknell University to launch a tech startup before starting Magnises, agreed to use the duplex “exclusively for residential purposes,” the suit claims.

The landlord wants $100,000 in damages for three months of repair work.

McFarland dismissed the allegations as “not valid.”