These cards go incredibly well with spells that care about a quantity of artifacts being in play or getting cast, such as Sai, Master Thopterist, Urza, Lord High Artificer, and Vedalken Archmage
However, like many Sagas, the value quotient only improves from there
There are three new Meld cards introduced The Brothers' War , when two cards meld together and form a third much more powerful entity
Fowl Play may look better since its in a color that doesnt have a lot of direct cheap creature kill, but its still essentially a worse Crib Swap
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In an ETB (enters the battlefield deck), while it will stall all your creatures for a turn, it can net you all those ETB triggers, AND, its 'any number' and that means you flicker the ones you want to flicker and leave your attack bombs alone