Fragmented Shards

As an additional cost to cast Fragmented Shards, sacrifice a nonland permanent.
Fragmented Shards deals Y damage to X targets.
Where Y is the converted mana cost of the
permanent sacrificed.
"...and so I turned my creation into a living defense.
Its end would be spontaneous, painless, and noble for
the protection of our home."
-Saundra Syn