Andrew Carnegie

{5}{t}: Only use this ability if you control an
artifact called Bessemer Steel Processor. Add 3
Steel Counters to Andrew Carnegie.
Each Steel Counter has {t}: Add two mana of
any color. Put a +1/+1 Counter on Andrew
Carnegie.
Artifacts you control get +2/+2.
Hexproof, indestructible
Carnegie made his fortune in the steel industry,
and would later devote his life to philanthropy.