There are no energies in the mix
I care about hitting land drops up to seven or eight mana
Secret missions appear in the missions tab after they've been completed and are ready to be redeemed for rewards, but until then there's no way of knowing that they're there until that point (unless you're using the guide above, of course)

Nocturno of Myras Marvels Fluros of Myras Marvels Dee Kay, Finder of the Lost Monoxa, Midway Manager Captain Rex Nebula Contortionist Otter Storm Wild Ogre Bupkis Notorious Sliver War Katerina of Myras Marvels Solaflora, Intergalactic Icon Claire DLoon, Joy Sculptor Brims Barone, Midway Mobster Lila, Hospitality Hostess Werewolf Lightning Mage Unique Charmed Pants Squid Fire Knight Unsanctioned Ancient Juggler Night Brushwagg Ringmaster Truss, Chief Engineer Grand Marshal Macie D00-DL, Caricaturist The Most Dangerous Gamer Devil K Nevil Vorthos, Steward of Myth Myra the Magnificent Comet, Stellar Pup Meet and Greet Sisay Jermane, Pride of the Circus Ambassador Blorpityblorpboop Tusk and Whiskers Trendy Circus Pirate Misunderstood Trapeze Elf Phyrexian Midway Bamboozle Unhinged Beast Hunt Eldrazi Guacamole Tightrope Space Beleren Happy Dead Squirrel Urzas Dark Cannonball The Space Family Goblinson Breeding Pool Sacred Foundry Overgrown Tomb Steam Vents Godless Shrine Temple Garden Stomping Ground Blood Crypt Watery Grave Hallowed Fountain Magic the Gathering is TM and copyright Wizards of the Coast, Inc, a subsidiary of Hasbro, Inc

Gym Leader Challenge is a popular example and is one of many listed in the Alternative Play Handbook linked below
Ive played for at least couple of hours every day this week, though Im starting to run out of things to do now