How can you create a combo with Robaran Mercenaries, Fain, the Broker, Marrow-Gnawer, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Robaran Mercenaries, Fain, the Broker, Marrow-Gnawer, Phyrexian Altar

Color identity: WB
Mana cost: 
Steps:
  1. Activate Robaran Mercenaries using Marrow-Gnawer's ability by sacrificing a Rat and tapping it, creating at least six 1/1 Rat creature tokens.
  2. Activate Phyrexian Altar four times by sacrificing four Rats, adding {3}{B}.
  3. Activate Robaran Mercenaries using Fain's fourth ability by paying {3}{B}, untapping Robaran Mercenaries.
  4. Repeat.
  5. Once you have infinite creature tokens, you may instead activate Fain's first ability to put infinite +1/+1 counters on creatures you control.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - Infinite colored mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Robaran Mercenaries does not have summoning sickness.
  - You control at least seven Rats.
[END OF COMBO PREREQUISITES]
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