Four mana, destroy all creatures, no scaling, life payment, or negotiation
Just being instant pretty much removes all diminishing returns from a discard card and so clique is a real winner with its ever so useful body

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Best Set for Commander Nymris, Oona's Trickster | Illustration by Johannes Voss If you haven't played Commander in a while, or are just getting into it, you may want to check out the Explorers of The Deep deck from The Lost Caverns of Ixalan Commander collection for some synergistic Simic action
Still, its playable in decks that want the effect