Activate Vhal by tapping it, adding at least ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) that cannot be spent to cast spells from your hand.
Activate Energy Refractor by paying ({2} magic symbol) , adding ({U} magic symbol) .
Activate Freed from the Real's second ability by paying ({U} magic symbol) , untapping Vhal.
Repeat.
Results
Infinite colored mana.
Infinite colorless mana that cannot be spent to cast spells from your hand.