For today’s blog post on the Magic: the Gathering Standard budget deck builds with the latest Ikoria: Lair of Behemoths set, we have this list that is a version of the Mutate deck that theme with the companion creature Umori, the Collector. The companion requirement is only to have one card type in each non-land card in the deck.

Check out this decklist below referenced from MTG Arena Zone.

Creatures
4 Arboreal Grazer
2 Archipelagore
4 Auspicious Starrix
2 End-Raze Forerunners
4 Migratory Greathorn
2 Mysterious Egg
4 Paradise Druid
4 Parcelbeast
4 Pollywog Symbiote
4 Pouncing Shoreshark

Lands
4 Simic Guildgate
4 Thornwood Falls
13 Forest
5 Island

Sideboard
1 Umori, the Collector

Source:
https://mtgazone.com/deck/simic-umori-mutate-budget-ikoria-lair-of-behemoths-standard-deck/