mtg apex cards Snapdax, of the Hunt Human creature you own Apex of Power Core Set

Since then, almost all older cards that cant attack have retroactively been given defender

Additionally, theres the issue that there simply may not be someone within your area that wants a card

The same is true for opus (Prismari) and increment (Quandrix), which don't require a lot of effort to work, while infusion and the Lorehold card need some more dedication (but the latter triggers over flashback cards, which are usually good by themselves)

Liesa, Forgotten Archangel Next is the newer (albeit weaker) version of Liesa, Liesa, Forgotten Archangel

Experimental Augury I love that proliferate is attached to so many cards as extra flavor