Fel Rin, Module Maker

Whenever you cast a blue instant or sorcery spell,
put an X/X colorless Construct artifact creature
token onto the battlefield, where X is that spell's converted mana cost.
Whenever you cast a red instant or sorcery spell,
put X 1/1 colorless Servo artifact creature tokens
onto the battlefield, where X is that spell's
converted mana cost.
"Metal is meant to move"