soundwave mtg card Soundwave, Sonic Spy // Soundwave, Superior Captain [Transformers] If you do MtG The Brothers' War Transformers

Rounding up the list are expensive spells like Brilliant Ultimatum and Rise of the Eldrazi, which you dont intend on casting for their regular cost

I can think of a few Limited formats in which a Simic deck would have literally zero possible answers to some of the best rares

Hero The Hero creature type, first introduced in the Marvel Secret Lair, will have an expanded presence in the Magic: The Gathering x Final Fantasy Universes Beyond set

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Tribute to the World Tree is helpful as well, playing into the +1/+1 counter theme and bolstering the power of the rest of your small creatures

Dont lose them to easy removal or single-target spells that dont specify that targets must be nonland