UI Shaggy, Hand of Salvation

When played, reverse everything
done to creature cards and send them
back in their respective owner's decks.
UI Shaggy is Immune to this effect entirely
"like, not bad man. that only took 2% of my power."
Upon having all four horsemen on the board
UI Shaggy will reverse everything
Damnation (The card and user)
has done within time itself.