How can you create a combo with Carth the Lion, Wrenn and Realmbreaker, Lotus Petal, The Chain Veil?
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[START OF COMBO]This combo can be formed with Carth the Lion, Wrenn and Realmbreaker, Lotus Petal, The Chain Veil

Color identity: BG
Mana cost: {5}{G}{G}
Steps:
  1. Activate The Chain Veil by paying {4} and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
  2. Cast Wrenn and Realmbreaker by paying {1}{G}{G}.
  3. Activate Wrenn and Realmbreaker's first loyalty ability by putting two loyalty counters on it, causing a land you control to become a 3/3 Elemental in addition to its other types.
  4. Activate Wrenn and Realmbreaker's third loyalty ability by removing six loyalty counters from it.
  5. Wrenn and Realmbreaker dies as a state-based action due to having zero loyalty.
  6. Resolve the Wrenn and Realmbreaker ability, causing you to get an emblem.
  7.  Cast Lotus Petal from your graveyard by paying {0}.
  8. Activate Lotus Petal by tapping and sacrificing it, adding one mana of any color.
  9. Repeat from step 7.[END OF COMBO STEPS]

Result:
  - Infinite casts of permanent spells in your graveyard
  - Infinite colored mana
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Carth the Lion must be on the battlefield
  - Wrenn and Realmbreaker must be in your hand
  - Lotus Petal must be in the graveyard
  - The Chain Veil must be on the battlefield
[END OF COMBO PREREQUISITES]
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