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So Equilibrium when played correctly is going to slow down your creatures by a turn but at the same time a creature that isnt on the table cant attack you and you can really punish your opponents for cheating in creatures especially if you have a Leyline of Anticipation so I think its a valuable addition to your list

Your turn

You don't perform the adamant instruction before the spell resolves or before any other effects printed above it

Combo Deck: Relying on powerful card interactions and synergies, combo decks assemble specific card combinations that generate substantial advantages or even claim victory

It doubles your treasure mana production, it has haste and flying so it can be effective immediately, and it still benefits you slightly when your opponents remove it with spells