Gold Rush

Any player may sacrifice any number of
nontoken lands they control, then they create a
tapped Treasure and a tapped Waste token for
each land they sacrificed this way. (Waste is a
basic land with "{t}: Add {c}". Treasure is an artifact
with "{t}, Sacrifice this artifact: Add one mana of
any color")
"There gold up in those hills!"
— Pasario county prospector