Duplication Stone enters the battlefield tapped.

{T}: Add {C} to your mana pool. This mana can't be spent to cast a nonartifact spell.

{2}: Roll a 6-sided die. On a result of 1-5, add {C} to your mana pool. On a result of a 6, create a tapped Powerstone token. Activate only once each turn, and only as a sorcery.