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 also lets you ignore the “singleton” rule in formats like Commander.
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.