Ulamog, the Infinite Gyre As a massive indestructible creature with a good removal spell stapled onto it, Ulamog, the Infinite Gyre is definitely worth its high mana cost
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Equip Artifact - Equipment The Unagi of Kyoshi Island Flash WardWaterbend
With drawing for turn and Naktamun's built-in card draw, that's a +2/+2 buff to all your attacking zombies, before you've even done any work
A three-drop that does neither is simply unacceptable
Isshin ensures each trigger fires twice creating double the tokens, dealing double the damage, drawing double the cards
This is likely due to the surprise Dinosaur sub-theme of March of the Machine with the tribe gaining several powerful new additions including Etali, Primal Conqueror, Ghalta and Mavren (showcase), Ancient Imperiosaur, and Kogla and Yidaro