Bituminous Blast [Mystery Booster] Ogre Warrior Shaman you may tap an untapped

you may tap an untapped creature you control rather than pay this spell's mana cost

Set: Commander 2019 Type: Land Rarity: Common Bojuka Bog enters the battlefield tapped

You gain 2 life for each card revealed this way

Set: Mirrodin Besieged Type: Creature — Human Rogue Rarity: Uncommon Cost: {1}{U}{U} Shroud (This creature can't be the target of spells or abilities

It's hard to avoid electric shock when the entire plane is metallic

Bituminous Blast [Mystery Booster] Ogre Warrior Shaman you may tap an untappedSet: Mystery Booster Type: Instant Rarity: Uncommon Cost: {3}{B}{R} Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.) Bituminous Blast deals 4 damage to target creature.