Atlatx Conduit

Echo {1} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
{t}: Add {2} to your mana pool, you can't use this mana to cast artifacts or creatures.
When Atlatx Conduit's echo cost isn't paid, sacrifice it and add {3} to your mana pool.