Umbris, Fear Manifest + Opposition Agent + Hive Mind + Mana Severance + Blade of Selves

Prerequisites

• Blade of Selves attached to Umbris.
• Umbris does not have summoning sickness.

Steps

1. 1Cast Mana Severance by paying .
2. 2Hive Mind triggers, causing each opponent to copy Mana Severance.
3. 3Resolve each opponent's Mana Severance, searching for and exiling all land cards from their libraries.
4. 4Resolve your Mana Severance, choosing not to exile any land cards from your library.
5. 5Move to your combat step.
6. 6Attack with Umbris.
7. 7Umbris triggers, creating a token copy of Umbris for each opponent you have, with each token tapped and attacking a different opponent.
8. 8Put all but one Umbris into your graveyard due to the legend rule.
9. 9Umbris triggers for each Umbris token that enters and each Umbris token triggers for itself and each other Umbris that enters.
10. 10Resolve the Umbris triggers, revealing no lands from opponent libraries and exiling each opponent library.

Effects

• Exile each opponent's library
• Near-infinitely large creature