How can you create a combo with Magus of the Coffers, Sword of the Paruns?
user
[START OF COMBO]This combo can be formed with Magus of the Coffers, Sword of the Paruns

Color identity: B
Mana cost: 
Steps:
  1. Pay {2} to activate Magus of the Coffers, adding at least six {B} (including initial mana, floating {8}).
  2. Pay {3} to attach Sword of the Paruns to Magus of the Coffers (floating {5}).
  3. Activate Sword of the Paruns, untapping Magus of the Coffers (floating {2}).
  4. Repeatedly tap the Magus for mana and untap it, generating at least {B} per iteration.[END OF COMBO STEPS]

Result:
  - Infinite black mana
  - Infinite untap of creatures you control
  - Infinite mana creatures you control can produce[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Magus of the Coffers is not summoning sick and can tap for mana.
  - At least six Swamps under your control.
  - {4} to start the combo (or {2} and Sword of the Paruns attached to Magus of the Coffers).
[END OF COMBO PREREQUISITES]
assistant