Ezuris main drawback is his size and inability to regenerate himself, but when your upside is so high, the downside just doesnt seem so bad
Normally, the big problem is that any kill spell can stop matters
The reason Im particularly interested in Harsh Scrutiny is threefold: There are very few one-mana plays worth considering in Standard right now, so the bar is actually pretty low
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And that you can sacrifice Spirits to add a red mana to your mana pool, which means that each noncreature spell you cast gives you the potential to cast even bigger spells next turn, or get to a double-spell turn
Its better than Ulamog, the Ceaseless Hunger if youre facing exactly one removal spell (that exiles) and the opponent has no troublesome permanents on the battlefield