Witness the Mystical

You may cast Witness the Mystical as though it
had flash if you pay {2} more to cast it.
Choose one—
• Return all creatures to their owner's hands.
• Untap all nonland permanents you control.
Remembrance {7}{g}{u} (You may cast this card
from your graveyard for its remembrance cost. If you
do, choose an additional mode beyond the first.)