Elite Arcanist, Mind Over Matter, Dream Salvage, and Entropic Eidolon

Prerequisites

• Elite Arcanist on the battlefield
• Mind Over Matter on the battlefield
• Dream Salvage in exile
• Entropic Eidolon in hand
• You have a way to cause an opponent to discard a card
• You have at least one additional card in hand
• You control at least one mana-producing permanent
• Elite Arcanist does not have summoning sickness

Steps

1. Cause an opponent to discard at least one card
2. Activate a mana-producing permanent by tapping it, adding at least
3. Activate Mind over Matter twice by discarding Entropic Eidolon and another card, untapping Elite Arcanist and the mana-producing permanent
4. Activate Elite Arcanist by paying and tapping it, casting a copy of Dream Salvage without paying its mana cost
5. Entropic Eidolon triggers, returning itself to your hand from your graveyard
6. Resolve Dream Salvage, causing you to draw at least one card
7. Repeat from step 2

Results

• Infinite draw triggers
• Infinite rummaging
• Infinite self-discard triggers
• Near-infinite magecraft triggers
• Near-infinite storm count