Manabarbs [Beta Edition] Commander 2017 Set: Kaldheim Prerelease Promos Type:

Set: Kaldheim Prerelease Promos Type: Legendary Creature — God Rarity: Mythic Cost: {1}{G}{G} Vigilance

Set: Beta Edition Type: Instant Rarity: Common Cost: {R} Cast this spell only during the declare blockers step

Set: Best of Promos Type: Metal Rarity: Promo Retreat cost: Colorless

but I didn't expect it from the building itself

Set: Zendikar Rising Type: Instant // Land Rarity: Rare Cost: {2}{R} Put any number of cards from your hand on the bottom of your library

Manabarbs [Beta Edition] Commander 2017 Set: Kaldheim Prerelease Promos Type:Set: Beta Edition Type: Enchantment Rarity: Rare Cost: {3}{R} Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.