Requires

Thawing Glaciers must be on the battlefield. Retreat to Coralhelm must be on the battlefield. Nissa, Resurgent Animist must be on the battlefield. Kelpie Guide must be on the battlefield. Kelpie Guide does not have summoning sickness. Mana needed:

Steps

1. Activate Thawing Glaciers by paying and tapping it, searching your library for a basic land card and putting it onto the battlefield tapped.
2. The land enters the battlefield, triggering Retreat to Coralhelm and Nissa.
3. Resolve the Nissa trigger, adding .
4. Resolve the Retreat to Coralhelm trigger, untapping Kelpie Guide.
5. Activate Kelpie Guide's first ability by tapping it, untapping Thawing Glaciers.
6. Repeat.

Results