Activate Orthion's first ability by paying ({1} magic symbol) ({R} magic symbol) and tapping it, creating a token copy of Diamond Lion with haste.
Activate the Diamond Lion token by tapping it, sacrificing it and discarding your hand, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
When the Diamond Lion token dies, Orthion triggers, untapping itself.
Repeat.
Once you have infinite mana, you may forego sacrificing the Diamond Lion tokens and/or target any other creature.
Results
Infinite colored mana.
Infinite copies of creatures you control with haste.