Color Identity: U

Initial Card State
- All permanents on the battlefield (Spark Double as a copy of River Kelpie).
Steps
- Activate Ashnod's Altar by sacrificing Spark Double, adding ({C} magic symbol)
({C} magic symbol)
. - When Spark Double dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
- 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.
- When Spark Double enters the battlefield, it and River Kelpie's first abilities trigger.
- Resolve both triggers, causing you to draw two cards.
- Repeat.
Results
- Infinite card draw.
- Infinite draw triggers.
- Near-infinite colorless mana.
- Near-infinite death triggers.
- Near-infinite ETB.
- Near-infinite LTB.
- Near-infinite sacrifice triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).