Lagomos, Hand of Hatred, Mind Over Matter, and Hostility

Prerequisites

• Lagomos, Hand of Hatred on the battlefield
• Mind Over Matter on the battlefield
• Hostility in the library
• At least five creatures have died this turn
• Lagomos does not have summoning sickness

Steps

1. Activate Lagomos by tapping it, searching your library for Hostility and putting it into your hand
2. Activate Mind over Matter by discarding Hostility, targeting Lagomos
3. Hostility triggers, shuflling it from your graveyard into your library
4. Resolve the Mind over Matter trigger, untapping Lagomos
5. Repeat

Results

• Infinite self-discard triggers