How can you create a combo with Carth the Lion, Karn, the Great Creator, Ugin's Nexus, The Chain Veil, Krark-Clan Ironworks?
user
[START OF COMBO]This combo can be formed with Carth the Lion, Karn, the Great Creator, Ugin's Nexus, The Chain Veil, Krark-Clan Ironworks

Color identity: BG
Mana cost: {2} on your first turn
Steps:
  1. Activate Krark-Clan Ironworks by exiling Ugin's Nexus, adding {C}{C}.
  2. Ugin's Nexus triggers, causing you to take an extra turn after this one.
  3. Activate Karn's first loyalty ability by putting two loyalty counters on it, causing any artifact to become an artifact creature until end of turn.
  4. Activate The Chain Veil by paying {4} and tapping it, allowing you to activate all planeswalker abilities an extra time this turn.
  5.  Activate Karn's second loyalty ability by removing a loyalty counter from it, returning Ugin's Nexus from exile to your hand.
  6. Move to your next turn.
  7. Cast Ugin's Nexus by paying {5}.
  8. Activate Krark-Clan Ironworks by exiling Ugin's Nexus, adding {C}{C}.
  9. Ugin's Nexus triggers, causing you to take an extra turn after this one.
  10. Activate Karn's second loyalty ability by removing a loyalty counter from it, returning Ugin's Nexus from exile to your hand.
  11. Move to your next turn.
  12. Cast Ugin's Nexus by paying {5}.
  13. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - {5} available on all odd-numbered extra turns, with {7} available on all even-numbered extra turns.
[END OF COMBO PREREQUISITES]
assistant