For example, if you control Muldrotha, the Gravetide ("During each of your turns, you may play a land and cast a permanent spell of each permanent type from your graveyard") and you cast a creature spell from your graveyard during your second main phase, you won't be able to cast another creature spell from your graveyard with Muldrotha's permission until after your next ending phase ends
Momo, Friendly Flier is a cheap flyer that reduces the cost of the first non-Lemur flying creature by
Flexibility, X spells, mana reliability, blah blah blah
I would have preferred them to just go all the way and go back to the original EX era template
Basic lands are ubiquitous and are included in all preconstructed decks and bundles, but MTG has many more powerful lands for players to choose from
You can have any number of them in your deck, so you could have several variations to use in a game rather than having to pick your favorite