How can you create a combo with Horde of Notions, Jegantha, the Wellspring, Chakram Retriever, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Horde of Notions, Jegantha, the Wellspring, Chakram Retriever, Altar of Dementia

Color identity: WUBRG
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing any other nontoken Elemental creature, causing target player to mill cards equal to the sacrificed creature's power.
  2. Activate Jegantha by tapping it, adding {W}{U}{B}{R}{G} that can't be spent to pay generic mana costs.
  3. Activate Horde of Notions by paying {W}{U}{B}{R}{G}, casting any Elemental creature from your graveyard without paying its mana cost.
  4. The Elemental enters the battlefield, triggering Chakram Retriever, untapping Jegantha.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Jegantha does not have summoning sickness.
  - You control another nontoken Elemental creature.
[END OF COMBO PREREQUISITES]
assistant