Cheapest priced copy (Assassin's Creed): $4.49 at Card Kingdom, near mint, their price list as of .
Templar Knight 
Creature — Human Knight · 3/1 · Uncommon · Assassin's Creed · #10
Vigilance
{W}, 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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $3.99 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Assassin's Creed | 10 | Uncommon | $4.49 | $3.99 |
| Assassin's Creed | 183 | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 5 July 2024The last ability of Templar Knight also lets you ignore the “singleton” rule in formats like Commander.
- 5 July 2024The 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.