There are tons of fantastic MTG elves cards already, so this may not cut the mustard - but elf tribal players, you've got another option
Stack the cards you need on top
During the clean-up step of every turn, all "until end of turn" and "this turn" effects (that is any effect with one of the two previous phrases in their rules text) check to see if they go away and are informed by Staying Power that they do not
Take note of the spider set symbol on these six cards as it used for cards from the Magic: The Gathering | Marvels Spider-Man set that are eternal legal (Commander, Legacy, and Vintage)
The Shire A lovely legendary land for Commander, even in decks that dont have a full Jodah, the Unifier legends typal focus, The Shire gives life, but better, it gives cardboard