Shatter the Crystal

Cast this spell only if you control Thurma and
the Crystal of Truth.
Transform The Crystal of Truth back into The
Dark Crystal and The Crystal Shard. Return all
Skeksis and Mystic creatures to the battlefield
under your control from the graveyard or exile.
The Crystal Shard loses all abilities and gains
"At the beginning of your end step, if you control
Crystalline eminence, and no offering tokens,
transform The Crystal Shard and the Dark
Crystal into the Crystal of truth."