How can you create a combo with Urza, Prince of Kroog, Grim Monolith, Mondrak, Glory Dominus, Thousand-Year Elixir?
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[START OF COMBO]This combo can be formed with Urza, Prince of Kroog, Grim Monolith, Mondrak, Glory Dominus, Thousand-Year Elixir

Color identity: WU
Mana cost: {3}
Steps:
  1. Activate Grim Monolith's first ability by tapping it, adding {C}{C}{C}.
  2. Activate Urza by paying {6}, creating two token copies of Grim Monolith that are 1/1 Soldiers in addition to their other types.
  3. Activate both Grim Monolith tokens' first abilities by tapping them, adding six {C}.
  4. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite tapped creature tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant