How can you create a combo with Liliana, Untouched by Death, Rooftop Storm, Ratadrabik of Urborg, Mirror Image?
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[START OF COMBO]This combo can be formed with Liliana, Untouched by Death, Rooftop Storm, Ratadrabik of Urborg, Mirror Image

Color identity: WUB
Mana cost: {2}{U}
Steps:
  1. Activate Liliana's third ability by removing three loyalty counters from it, allowing you to cast Zombie spells from your graveyard this turn.
  2. Cast Mirror Image by paying {2}{U}, choosing to have it enter the battlefield as a copy of Ratadrabik.
  3. Put the original Ratadrabik into your graveyard due to the legend rule.
  4. Each other copy of Ratadrabik triggers, creating a nonlegendary token copy of Ratadrabik that is a 2/2 Zombie in addition to its other types.
  5. Cast Ratadrabik from your graveyard by paying {0}.
  6. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Liliana, Untouched by Death must be on the battlefield
  - Rooftop Storm must be on the battlefield
  - Ratadrabik of Urborg must be on the battlefield
  - Mirror Image must be in your hand
  - Liliana has at least three loyalty counters on it.
[END OF COMBO PREREQUISITES]
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