Spellweaver Helix, Regrowth, Emeritus of Abundance // Regrowth, and Early Harvest

Prerequisites

• Spellweaver Helix on the battlefield
• Regrowth in exile
• Emeritus of Abundance // Regrowth on the battlefield
• Early Harvest in hand
• available

Steps

1. Cast Early Harvest by paying its mana cost, untapping at least five basic lands
2. Cast a copy of Regrowth from exile by paying , targeting Early Harvest
3. Spellweaver Helix's last ability triggers, allowing you to cast the Extra Combat Sorcery, giving you an additional combat phase and an additional main phase this turn
4. Resolve the copy of Regrowth, returning Early Harvest from your graveyard to your hand
5. Declare Emeritus of Abundance as an attacker
6. When Emeritus of Abundance attacks, it triggers, becoming prepared
7. Repeat each main phase

Results

• Infinite combat phases
• Infinite magecraft triggers