How can you create a combo with Marina Vendrell's Grimoire, Sheoldred, the Apocalypse?
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[START OF COMBO]This combo can be formed with Marina Vendrell's Grimoire, Sheoldred, the Apocalypse

Color identity: UB
Mana cost: {5}{U}
Steps:
  1. Cast Marina Vendrell's Grimoire by paying {5}{U}.
  2. When Marina Vendrell's Grimoire enters the battlefield, its first ability triggers, causing you to draw five cards.
  3. Sheoldred's first ability triggers five times.
  4. Resolve the first Sheoldred trigger, causing you to gain 2 life.
  5. Marina Vendrell's Grimoire's second ability triggers, causing you to draw two cards.
  6. Sheoldred's first ability triggers twice.
  7. Repeat from step 4.[END OF COMBO STEPS]

Result:
  - Near-infinite lifegain
  - Near-infinite lifegain triggers
  - Infinite card draw
  - Infinite draw triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Marina Vendrell's Grimoire must be in your hand
  - Sheoldred, the Apocalypse must be on the battlefield
[END OF COMBO PREREQUISITES]
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