Invasion

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {R}.)

Salt Marsh enters the battlefield tapped. {T}: Add {U} or {B}.

({T}: Add {U}.)

({T}: Add {W}.)

As Alloy Golem enters the battlefield, choose a color. Alloy Golem is the chosen color. (It's still an artifact.)

{T}, Pay 1 life: Add one mana of any color.

({T}: Add {G}.)

{T}: Add {C}. {T}, Sacrifice Archaeological Dig: Add one mana of any color.

Creatures with power 1 or less don't untap during their controllers' untap steps.

Flying {T}: Add one mana of any color.