Morphic Pool (Expeditions) [Zendikar Rising Expeditions] 62 by Tributing 1 Thunder Effect

by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")

The seed of a world's evil

Set: International Collectors’ Edition Type: Sorcery Rarity: Uncommon Cost: {2}{G} Destroy target land

Activated abilities of sources with the chosen name can't be activated unless they're mana abilities

Set: Limited Edition Alpha Type: Enchantment — Aura Rarity: Uncommon Cost: {1}{G}{G} Enchant creature

Morphic Pool (Expeditions) [Zendikar Rising Expeditions] 62 by Tributing 1 Thunder EffectSet: Zendikar Rising Expeditions Type: Land Rarity: Mythic Morphic Pool enters the battlefield tapped unless you have two or more opponents. {T}: Add {U} or {B}.