Nahiri, Forged in Fury [March of the Machine: The Aftermath] Insect Shade then discard four cards

then discard four cards

you may cast an artifact spell from your hand or graveyard by paying life equal to its mana value rather than paying its mana cost

That opponent may repeat this process as many times as they choose

[End of Your Turn] Set up to 1 of your DON

but what could never be

Nahiri, Forged in Fury [March of the Machine: The Aftermath] Insect Shade then discard four cardsSet: March of the Machine: The Aftermath Type: Legendary Creature Kor Artificer Rarity: Mythic Cost: {4}{R}{W} Affinity 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.