Now comes the showdown the Knicks have long been waiting for

DETROIT — Get ready for the silly leprechaun with his pipe and the obnoxious fans at TD Garden who act like “r” can’t possibly end a word.

‘Chowdah.’

Get ready for Jayson Tatum, deadpanning from Joe Mazzulla, a barrage of 3-pointers and, yes, get ready for a playoff series against the former unicorn of MSG, Kristaps Porzingis.

The Knicks eliminated the Pistons on Thursday by the skin of their teeth — scratching, collapsing, recovering and, of course, riding Jalen Brunson until he hit one of those shots that’ll be replayed in his “Captain Clutch” documentary.