Coveted Prize, Dragon's Approach, and Spellweaver Helix

Prerequisites

• Coveted Prize in exile
• Dragon's Approach in exile
• Spellweaver Helix on the battlefield
• You have at least one more copy of Dragon's Approach in your hand, and at least one more copy in your library
• You have a full party
• available

Steps

1. Cast Dragon's Approach by paying
2. Spellweaver Helix triggers, causing you to cast a copy of Coveted Prize without paying its mana cost
3. Resolve the copy of Coveted Prize, causing you to search your library for a Dragon's Apporach and put it into your hand, and then cast Dragon's Approach without paying its mana cost
4. Repeat from step 2 until you have cast every Dragon's Approach in your library
5. Resolve a Dragon's Approach, dealing 3 damage to each opponent, and allowing you to exile it and four other cards named Dragon's Approach from your graveyard to search your library for a Dragon creature card and put it onto the battlefield
6. Repeat step 5 for each remaining Dragon's Approach

Results

• Cast every Dragon's Approach in your library and hand without paying their mana costs
• Near-infinite damage
• Near-infinite magecraft triggers
• Near-infinite storm count