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Of course this doesnt mean you still cant have creature like that in the deck since Zimone might not always be on board, and you do have access to Blue which has blink and bounce effects to help reuse those cards, like Thassa Deep Dwelling, Essence Flux, or in Green Kogla the Titan Ape and Temur Sabertooth

The Nazgl's abilities work well with each other, so this might end up being a powerful strategy

Would you prefer to bring some 2/2 Knight Ally tokens instead

A deck can have any number of cards named Cid, Timeless Artificer

Unfortunately, you cant let your menace creatures be blocked by only one creature if you want

Winter is a great example of a card thats very unlikely to see Standard play but is a slam dunk in Commander