Arcane Sanctum [March of the Machine Commander] Nightmare Demon if you control three or

if you control three or more creatures with different powers

Set: Commander 2021 Type: Creature — Hydra Rarity: Rare Cost: {4}{G}{G} {X}{X}{G}: Monstrosity X

Set: Invasion Type: Legendary Creature — Horror Rarity: Rare Cost: {5}{B}{R} First strike

The bane of all artificers

Not all monsters have tentacles

Arcane Sanctum [March of the Machine Commander] Nightmare Demon if you control three orSet: March of the Machine Commander Type: Land Rarity: Uncommon Arcane Sanctum enters the battlefield tapped. {T}: Add {W}, {U}, or {B}. "We must rely on our own knowledge, not on the dogma of the seekers or the mutterings of the sphinxes." Tullus of Palandius