The Battle of Bywater

(You may cast a legendary sorcery only if you
control a legendary creature or planeswalker.)
Choose any number —
• Destroy all non-Hobbit creatures
• Destroy all planeswalkers.
• Destroy all artifacts and enchantments.
Each player may search their library for a basic
land card for each nontoken permanent they controlled which was destroyed this way, reveal
them, put them into their hand, then shuffle their library.