Terraforming Mars: Spielbox 2/17 Promo
Was also available as a reward for backing The Secret Cabal Gaming Podcast Kickstarter 2017 Campaign and the Man vs Meeple Kickstarter 2018 Campaign.
Requires 2 oceans.
Increase plant production and your heat production 1 step each.
Protected by the ice and the micro-environment it creates inside, making the ice darker.