Relic of Legends, Arachne, Psionic Weaver, and Spider-Man, Web-Slinger

Prerequisites

• Relic of Legends on the battlefield
• Arachne, Psionic Weaver in hand or on the battlefield
• Spider-Man, Web-Slinger in hand or on the battlefield
• plus enough to pay for commander tax if applicable available

Steps

1. Activate Relic of Legends's second ability by tapping Arachne, adding one mana of the appropriate color to cast Spider-Man
2. Cast Spider-Man for its web-slinging cost, paying one mana and returning Arachne to your hand
3. Activate Relic of Legends's second ability by tapping Spider-Man, adding one mana of the appropriate color to cast Arachne
4. Cast Arachne for its web-slinging cost by paying one mana and returning Spider-Man to your hand
5. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite storm count