Alex, Lord of Barters

Echo {r}{2} (At the beginning of your upkeep,
if this came into play since the beginning of your
last upkeep, sacrifice it unless you pay its echo cost.)
When Alex, Lord of Barters enters the battlefield,
gain control of all artifacts in play.
{t},Sacrifice an artifact: Add X red mana to your
mana pool where X is the amount of artifacts
you control