Mirrorpool, Splendid Reclamation, Need for Speed, and Archelos, Lagoon Mystic

Prerequisites

• Mirrorpool on the battlefield
• Splendid Reclamation in hand
• Need for Speed on the battlefield
• Archelos, Lagoon Mystic on the battlefield
• available

Steps

1. Cast Splendid Reclamation by paying
2. Holding priority, activate any number of lands you control except Mirrorpool by tapping them, adding at least
3. Activate Need for Speed by sacrificing a land other than Mirrorpool
4. Repeat step 3 until Mirrorpool is the only land you control
5. Activate Mirrorpool's second ability by paying , tapping and sacrificing it, copying Splendid Reclamation
6. Resolve the Splendid Reclamation copy, returning all land cards from your graveyard to the battlefield untapped due to Archelos
7. Repeat from step 2

Results

• Infinite mana lands you control can produce
• Infinite magecraft triggers
• Infinite landfall triggers