mtg upkeep cards About cumulative upkeep... : r/mtg Legal in Standard, Rules Text:

Assuming all "standard size" sleeves are identical: They're not

While there may be other cards that offer similar effects, Finale of Devastation's versatility and potential for a game-ending play make it a strong contender for inclusion in decks that can support its mana cost

As for the other three (Evolution SageEvolution Sage, Metallic MimicMetallic Mimic, and RealmwalkerRealmwalker), while they're creating synergy with the deck, I would have preferred something a little more oceanic, or at least from Ixalan itself, like Roaming ThroneRoaming Throne, for example

The Thing's second ability will check as your beginning of combat step starts to see if you've cast a noncreature spell this turn

In fact, Landfall is one of the most popular builds of Yarok, providing value ramp to ensure you can keep replaying the Elemental Horror even if they deal with it