Empowered Autogenerator has at least four charge counters on it.
Steps
Activate Empowered Autogenerator by tapping it, putting a charge counter on it and adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate Clock of Omens by tapping Grim Monolith and Soliton, untapping Empowered Autogenerator.
Activate Soliton by paying ({U} magic symbol) , untapping it.
Activate Grim Monolith's second ability by paying ({4} magic symbol) , untapping it.
Repeat.
Once you have infinite mana, you may use it to activate Grim Monolith's other abilities and/or untap any artifact(s) you control.
Results
Infinite card draw.
Infinite charge counters on Empowered Autogenerator.