Cauldron of Souls [Commander 2016] Dissension but I didn't expect it

but I didn't expect it from the building itself

Set: Kaladesh Inventions Type: Artifact Creature — Construct Rarity: Mythic Cost: {4}{U}{U} Flash

where X is the number of creature cards in your graveyard

Set: Guilds of Ravnica Prerelease Promos Type: Instant Rarity: Rare Cost: {B}{G} Destroy target permanent an opponent controls

Cauldron of Souls [Commander 2016] Dissension but I didn't expect itSet: Commander 2016 Type: Artifact Rarity: Rare Cost: {5} {T}: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it dies, if it had no 1 1 counters on it, return it to the battlefield under its owner's control with a 1 1 counter on it.)