Organic Extinction

Improvise (Your artifacts can help cast this spell.
Each artifact you tap after you're done activating
mana abilities pays for {1}.)

Destroy all nonartifact creatures.

//Transcript follows...
The Titans gone rogue. Stay down... Titan 621,
we are friendlies. Stand down immedia - (gunfire)... (unintelligible shouting)...
... Transcript ends//