Mox Obsidian
by on
Mox Obsidian
by on

Mox Obsidian

{t}, Discard a card : Add one mana of any of the discarded card's colors to your mana pool.
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. In this process, great power can be imprisoned within it.

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