How can you create a combo with Svella, Ice Shaper, Dockside Extortionist, Thornbite Staff, Mortuary, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Svella, Ice Shaper, Dockside Extortionist, Thornbite Staff, Mortuary, Phyrexian Altar

Color identity: BRG
Mana cost: {6}{R/G}
Steps:
  1. Activate Phyrexian Altar by sacrificing Dockside Extortionist, adding {R/G}.
  2. Dockside Extortionist dies, triggering Svella and Mortuary.
  3. Resolve the Svella trigger, untapping it.
  4. Resolve the Mortuary trigger, putting Dockside Extortionist on top of your library.
  5. Activate Svella's second ability by paying {6}{R}{G} and tapping it, causing you to reveal the top four cards of your library and cast Dockside Extortionist without paying its mana cost.
  6. Dockside Extortionist enters the battlefield, creating at least eight Treasure tokens.
  7. Activate seven Treasure tokens by tapping and sacrificing them, adding {6}{R/G}.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Thornbite Staff attached to Svella.
  - Svella does not have summoning sickness.
  - Opponents control at least eight artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
assistant