How can you create a combo with Spark Double, River Kelpie, Ashnod's Altar?
user
[START OF COMBO]This combo can be formed with Spark Double, River Kelpie, Ashnod's Altar

Color identity: U
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Spark Double, adding {C}{C}.
  2. When Spark Double dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. As Spark Double enters the battlefield, choose to have it enter the battlefield as a copy of River Kelpie with a +1/+1 counter on it.
  4. When Spark Double enters the battlefield, it and River Kelpie's first abilities trigger.
  5. Resolve both triggers, causing you to draw two cards.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite colorless mana
  - Near-infinite death triggers
  - Near-infinite enters the battlefield
  - Near-infinite leaves the battlefield
  - Near-infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant