Tuff Twins

Tuff Twins is a boss added in The Binding of Isaac: Repentance that can appear in the Mines. Contents • 1 Behavior • 2 Gallery • 3 Notes • 4 Trivia • 5 Bugs

Tuff Twins always spawn in a pair consisting of 5 body segments and a head segment each. They are always fought in a double-sized room.

• The Tuff Twins roam around the room randomly, like Larry Jr.
• Normally invincible, but bombs and explosives can destroy their stony exteriors (after 15 damage per segment), making their segments vulnerable.
• There are always at least two Bomb Grimaces that dispense Throwable Bombs for Isaac to use against the Tuff Twins.
• Head segments spit Inks while protected by its rock armor.
• Vulnerable head segments spit Suckers instead.
• Vulnerable body segments spew bloody shots, similar to Boils.
• When a flesh segment is killed it spews blood shots.
• Tuff Twin segments can be split into smaller copies of the boss as long as the new Tuff Twin segments are longer than 2 pieces.
• The Tuff Twins become faster the more rock armor they lose.

• Terra, along with any items that create rock waves like Mega Bean and Wait What? can destroy the Tuff Twins' armor.
• Neither Fire Mind explosions nor Sulfuric Acid tears can destroy their armor.
• Killing all the Bomb Grimaces with effects like Little Horn and Euthanasia can soft-lock Isaac in this fight.
• Plan C cannot kill the Tuff Twins if they still have their armor. (Possibly a bug?)

• They appear to be a rocky variation of Larry Jr.
• The Shell appears to be the posthumous version of them.
• Tuff is the name of a type of rock formed from volcanic ash.