Chimil, the Inner Sun (Promo Pack) [The Lost Caverns of Ixalan Promos] Zombie Naga each player will need a

each player will need a deck of sixty cards

They mutate into the creature on top plus all abilities from under it

untap equipped creature

When Burning-Rune Demon enters the battlefield

"It's just business

Chimil, the Inner Sun (Promo Pack) [The Lost Caverns of Ixalan Promos] Zombie Naga each player will need aSet: The Lost Caverns of Ixalan Promos Type: Legendary Artifact Rarity: Mythic Cost: {6} Spells you control can't be countered. At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)