If you are in a limited event and you want to see your sideboard, simply double click, or click and edit, your deck to look at your card pool

Apes Red Ghost, Intangible Genius 6.2%inclusion 7 decks 113 decks Top Commanders Kibo, Uktabi Prince 95%inclusion 964 decks 1.01K decks Kogla and Yidaro 0.9%inclusion 9 decks 1.01K decks Grunn, the Lonely King 0.8%inclusion 8 decks 1.01K decks Kogla, the Titan Ape 0.3%inclusion 3 decks 1.01K decks Rashmi and Ragavan 0.3%inclusion 3 decks 1.01K decks Alena, Kessig Trapper // Gilanra, Caller of Wirewood 0.2%inclusion 2 decks 1.01K decks Klothys, God of Destiny 0.1%inclusion 1 decks 1.01K decks The Ur-Dragon 0.1%inclusion 1 decks 1.01K decks Xenagos, God of Revels 0.1%inclusion 1 decks 1.01K decks Gut, True Soul Zealot // Agent of the Shadow Thieves 0.1%inclusion 1 decks 1.01K decks The Beamtown Bullies 0.1%inclusion 1 decks 1.01K decks Omo, Queen of Vesuva 0.1%inclusion 1 decks 1.01K decks Tasigur, the Golden Fang 0.1%inclusion 1 decks 1.01K decks Jeska, Thrice Reborn // Ludevic, Necro-Alchemist 0.1%inclusion 1 decks 1.01K decks Kumena, Tyrant of Orazca 0.1%inclusion 1 decks 1.01K decks Marrow-Gnawer 0.1%inclusion 1 decks 1.01K decks Meren of Clan Nel Toth 0.1%inclusion 1 decks 1.01K decks Ragavan, Nimble Pilferer 0.1%inclusion 1 decks 1.01K decks Mr

As you want to be going tall on one creature
Conveniently, each of the new legendary creatures clearly defines the deck that it wants to helm: Inalla wants to play with Wizards, Kess casts spells, and Mairsil well, Mairsil does whatever he wants, because who is going to stop him
I run a Superfriends Commander deck - an archetype that focuses heavily on Planeswalkers - and I have rarely slotted any recent releases into the deck, as they simply don't pack the same punch as my older cards