Terra, Magical Adept // Esper Terra, and Spark Double

Prerequisites

• Terra, Magical Adept // Esper Terra on the battlefield
• Spark Double in hand
• available

Steps

1. Cast Spark Double by paying , choosing to have it enter the battlefield as a copy of Esper Terra that isn't legendary
2. This will cause it to enter the battlefield with a lore counter as it will be a Saga
3. Spark Double's first chapter ability triggers, creating a token copy of Spark Double with haste, which will enter as a copy of Esper Terra with haste that isn't legendary and with one to four lore counters on it
4. The Spark Double token's chapter abilities will trigger according to how many lore counters were placed on it
5. Resolve the first Spark Doubler trigger, creating a token copy of Spark Double with haste, which will enter as a copy of Esper Terra with haste that isn't legendary and with one to four lore counters on it
6. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite creature tokens with haste