Urza, Ruler of Artifacts

Artifacts can be tapped for blue.
Apells and Abilities you control has affinity for artifacts.
{u}{u} Target permant you control becomes an artifact in addition to it's other types.
{3} take control of target artifact.
{x}{u} create a 0/0 artifact creature token with;
"This gets a +1/+1 for every artifact you
control", where {x} is how many artifacts you
control.