Steam Vents (Promo Pack) [Guilds of Ravnica Promos]Set: Guilds of Ravnica Promos Type: Land Island Mountain Rarity: Rare ({T}: Add {U} or {R}.) As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. "A massive new Izzet building project with an unstated purpose? Probably fine." Zija, Simic mutationist

draw an additional card

Underworld Dreams deals 1 damage to that player

When the last is removed

Set: Alpha Edition Type: Land — Island Swamp Rarity: Rare ({T}: Add {U} or {B}

Spellvoid 2 (If your hero would be dealt arcane damage

Set: Neo Genesis Unlimited Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

put those cards into your hand

where X is the number of Swamps you control

"For my confession they burned me with fire And found that I was for endurance made

Set: International Collectors' Edition Type: Sorcery Rarity: Uncommon Cost: {1}{G} Return target card from your graveyard to your hand

Set: Throne of Eldraine Promos Type: Legendary Planeswalker — Oko Rarity: Mythic Cost: {1}{G}{U} +2: Create a Food token

but I didn't expect it from the building itself