Magus of the Candelabra without summoning sickness).
Steps
Activate
Magus Lucea Kane by tapping it, adding ({C} magic symbol) ({C} magic symbol) .
Activate
Magus of the Candelabra by paying ({2} magic symbol) and tapping it, targeting it and
Magus Lucea Kane.
Magus Lucea Kane triggers, copying the
Magus of the Candelabra ability, untapping
Magus of the Candelabra and
Magus Lucea Kane.
Holding priority, repeat as many times as desired.
Resolve a
Magus of the Candelabra ability, untapping it and
Magus Lucea Kane.
Activate
Magus Lucea Kane and
Magus of the Candelabra by tapping them, adding ({C} magic symbol) ({C} magic symbol) ({G} magic symbol) .
Repeat from step 5 for each stacked
Magus of the Candelabra ability.
Optionally, cast a spell with ({X} magic symbol) in its mana cost or activate an ability with ({X} magic symbol) in its activation cost, causing it to be copied once for each time
Magus Lucea Kane was activated in step 6.
If desired, you can repeat this loop from step 1 and cost other spells or activate other abilities with ({X} magic symbol) in their cost.
Results
Infinite colorless mana.
Infinite mana lands you control can produce.
Infinite green mana.
Infinite untap of lands you control.
Infinite untap of nontoken creatures you control.
Infinite copies of abilities with ({X} magic symbol) in their cost.
Infinite copies of spells with ({X} magic symbol) in their mana cost.
Infinite mana nontoken creatures you control can produce.