And if your opponent lets him live for a turn, you can turn him into Ifrit, Warden of Inferno , a 9/9 that immediately fights another creature, before pumping out a pile of red mana the next turn
While I don't think such a deck exists at the moment, I wouldn't completely write off the possibility of it eventually happening, but for the time being, Umori ranks near the bottom of our list
When you entirely lack an area the Decay never seems like the card to plug that hole
Wall of Caltrops Rarity: Common TYPE: Creature SUBTYPE: Wall CMC: 2 Mana cost: USD: $1.01 EUR: 0.86 TIX: 0.00 EDHREC RANK: 26075 (2/1) Defender (This creature can't attack.) Whenever this creature blocks a creature, if at least one other Wall creature is blocking that creature and no non-Wall creatures are blocking that creature, this creature gains banding until end of turn
[5] Legendary lands, like Boseiju, Who Shelters All, and non-creature artifacts, like Akromas Memorial, do not allow you to cast legendary sorceries