Nahiri, Forged in Fury - [Halo Foil, Showcase] March of the Machine: The Aftermath (MAT) fab you may reveal a Merfolk

you may reveal a Merfolk card from your hand

{T}: Create a token that's a copy of another target creature you control

) Each other creature you control enters the battlefield with an additional +1/+1 counter on it

—Cho-Arrim saying

Nahiri, Forged in Fury - [Halo Foil, Showcase] March of the Machine: The Aftermath (MAT) fab you may reveal a MerfolkAffinity for Equipment (This spell costs {1} less to cast for each Equipment you control.) Whenever an equipped creature you control attacks, exile the top card of your library. You may play that card this turn. You may cast Equipment spells this way without paying their mana costs.