Sentinel of the Nameless City [The Lost Caverns of Ixalan Prerelease Cards] Brainiac create a 5/5 black Demon

create a 5/5 black Demon creature token with flying

then create six 2/2 green Cat Warrior creature tokens with forestwalk

but per our waiver

Thick smoke billows and twists to form disturbing faces that cackle and click their teeth to the popping embers

Sentinel of the Nameless City [The Lost Caverns of Ixalan Prerelease Cards] Brainiac create a 5/5 black DemonSet: The Lost Caverns of Ixalan Prerelease Cards Type: Creature Merfolk Warrior Scout Rarity: Rare Cost: {2}{G} Vigilance Whenever Sentinel of the Nameless City enters the battlefield or attacks, create a Map token. (It's an artifact with "1, T, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.") "Halt, traveler. Whatever you seek, you will not find it here."