Raibura Disciple of Urza

{2}{u} : Create an Artifact Powerstone ingrained with: {t} Add mana of any color.
{r/g}{g/u}{t} : Create a token Artifact Creature Golem Soldier colorless 1/1.
Creatures you control get +1/+1 for each Power Stone in play under your control.
Reading the stories of the brothers who devastated the earth with their war, he decided it was time to start his own experiments.