Libra, City of Oasis

{t}: Add one mana of any color to your mana
pool. Activate only if you control another Desert.

{t}, Exert Libra: The next time a creature you control would die, exile it. Then, you may create a token copy of that creature except it
is a 1/1 Mirage in addition to its other types.

Beware a Pathfinder who returns from the desert alone. -Dangers of the Desert, Volume 5