Magus of the Candelabra do not have summoning sickness.
Steps
Activate
Magus Lucea Kane by tapping it, adding ({C} magic symbol) ({C} magic symbol) , and copying the next spell you cast or ability you activate with ({X} magic symbol) in its mana cost.
Activate
Magus of the Candelabra by paying ({1} magic symbol) and tapping it, targeting itself.
Magus Lucea Kane triggers, copying
Magus of the Candelabra's ability, targeting
Magus Lucea Kane.
Resolve both abilities, untapping
Magus Lucea Kane and
Magus of the Candelabra.
Repeat.
Results
Infinite colorless mana.
Infinite mana creatures you control can produce.
Infinite mana lands you control can produce.
Infinite untap of creatures you control.
Infinite untap of lands you control.
Infinite untap of nontoken creatures you control.
Infinite mana nontoken creatures you control can produce.