Moonshard ritual, when it activates Shatter, doesn't deal the 7 damage. The Spread is On Play, so it does that (and it's Eternal, too, so if you can't remove cards you're dead :P), but the On Spread effect doesn't follow
So yeah, that's a trap (if it was intentional then well played lol)
Now I'll have to suck up the 8 damage without being able to defend myself rip