12 cards where the cards aren’t reprints and the card has the keyword “Lieutenant”

Loyal Apprentice (Commander 2018 #23)
Thunderfoot Baloth (Commander 2014 #49)
Loyal Guardian (Commander 2018 #31)
Skyhunter Strike Force (Phyrexia: All Will Be One Commander #21)
Tyrant's Familiar (Commander 2014 #39)
Loyal Subordinate (Commander 2018 #16)
Loyal Drake (Commander 2018 #10)
Angelic Field Marshal (Commander 2014 #2)
Stormsurge Kraken (Commander 2014 #18)
Siege-Gang Lieutenant (Modern Horizons 3 Commander #61)
Loyal Unicorn (Commander 2018 #4)
Demon of Wailing Agonies (Commander 2014 #21)

This search is finished. Now the real work can begin.