Casting cost

From MTG Salvation Wiki

Casting cost is an obsolete word for mana cost. "Total casting cost" was used to refer to converted mana cost.

From the Comprehensive Rules Casting Cost (Obsolete) Some older cards used the term “casting cost” to describe the mana cost of a spell. In general, cards that were printed with the term “casting cost” now use the term “mana cost.” Cards that used the term “total casting cost” now use the term “converted mana cost.”