Umbris, Fear Manifest + Opposition Agent + Hive Mind + Mana Severance + Deadeye Navigator

Umbris, Fear Manifest

Opposition Agent

Hive Mind

Mana Severance

Deadeye Navigator

How it works

1. Cast Mana Severance by paying 1.
2. Hive Mind triggers, causing each opponent to copy Mana Severance.
3. Resolve each opponent's Mana Severance, searching for and exiling all land cards from their libraries.
4. Resolve your Mana Severance, choosing not to exile any land cards from your library.
5. Activate Umbris by paying 1, blinking Umbris.
6. Umbris triggers, revealing no lands from an opponent library, exiling their library.
7. Repeat from step 5 for each opponent.