THE BEST MANA ROCKS FOR CEDH Lets get something out of the way first the best mana rocks for cEDH
One of his main themes is in drawing cards, whether it be a straight and wholesome draw like in Unraveler of Secrets, Memory Adept Arcane Strategist, or the original Jace Beleren, or in more destructive 'wheel' effects like those found on Jace, the Living Guildpact
In technical rules terms, we call this template an object's "copiable characteristics." Because a mana ability resolves immediately after being activated, it doesn't create an object that has these copiable characteristics
This last version can even run flicker effects like Thassa, Deep-Dwelling to get more enters the battlefield ring temptations
When you consider the amount of value that blinking a full board of creatures might result in, it's not hard to see how Eerie Interlude can be a great deal