Morphic Pool (Expeditions) [Zendikar Rising Expeditions] 62 Activated abilities of sources with

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

You lose life equal to its converted mana cost

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

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

The seed of a world's evil

Morphic Pool (Expeditions) [Zendikar Rising Expeditions] 62 Activated abilities of sources withSet: 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}.