Echo Circlet [Scars of Mirrodin] Nymph it produces mana of a

it produces mana of a color of your choice instead of any other type

Set: Commander 2015 Type: Enchantment Rare Cost: {1}{W}{W} When Grasp of Fate enters the battlefield

Set: Ixalan Type: Creature — Human Pirate Rare Cost: {1}{B} Menace Whenever Fathom Fleet Captain attacks

but I know it isn't here

Set: Commander 2017 Type: Legendary Artifact Creature — Dragon Mythic Cost: {6} Flying Whenever you cast a spell

Echo Circlet [Scars of Mirrodin] Nymph it produces mana of aSet: Scars of Mirrodin Type: Artifact Equipment Common Cost: {2} Equipped creature can block an additional creature each combat. Equip {1} After the vanishing of the elder generations, the Anvil Tribe developed creative solutions to their personnel shortages.