Requires

Archelos, Lagoon Mystic must be on the battlefield. Fertilid must be on the battlefield. Retreat to Kazandu must be on the battlefield. Stone-Seeder Hierophant must be on the battlefield. You control a land that can tap to produce at least . Fertilid has at least one +1/+1 counter on it. Stone-Seeder Hierophant does not have summoning sickness. Archelos is untapped. Mana needed:

Steps

1. Activate a mana-producing land by tapping it, adding at least .
2. Activate Stone-Seeder Hierophant by tapping it, untapping the land.
3. Activate Fertilid by paying and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it onto the battlefield untapped due to Archelos.
4. When the basic land enters the battlefield, Retreat to Kazandu triggers, putting a +1/+1 counter on Fertilid.
5. Activate the basic land by tapping it, adding .
6. Repeat.

Results