Creature — Human Knight
3 / 1
Vigilance

, Tap five untapped attacking creatures you control named Templar Knight: Search your library for a legendary artifact card, put it onto the battlefield, then shuffle.
A deck can have any number of cards named Templar Knight.
The last ability of Templar Knight lets you ignore the “four-of” rule. It doesn’t let you ignore format legality. For example, you can’t add Templar Knight to a Standard or Pioneer deck.