A few are
Cards from sets that will be in Standard longer, like Foundations with their extended legality until at least 2029, give more bang for your buck
Thankfully, even if Wizards of the Coast wont create any more Cephalid MTG cards, they can still make Cephalids in spirit
Exile three cards from your graveyard: Psychic Frog gains flying until end of turn
This unassuming rodent, printed in Return to Ravnica, basically required an immediate answer, or it would multiply out of control, each copy making the rat horde, and the rats themselves, grow bigger and bigger
While not too powerful on its own, Toph's primary strength comes from letting you still get the benefits of your full mana pool by temporarily Earthbending artifacts instead, while doubling the mana potential of cards like Chromatic Lantern if activated in the correct order