Odyssey

({T}: Add {B}.)

({T}: Add {B}.)

({T}: Add {U}.)

({T}: Add {R}.)

Ravaged Highlands enters the battlefield tapped. {T}: Add {R}. {T}, Sacrifice Ravaged Highlands: Add one mana of any color.

Seafloor Debris enters the battlefield tapped. {T}: Add {U}. {T}, Sacrifice Seafloor Debris: Add one mana of any color.

({T}: Add {B}.)