Encroaching Mycosynth + Daretti, Scrap Savant + Spark Double + Felidar Guardian

Prerequisites

• You control an additional nonland permanent.
• At least three loyalty counters on Daretti.

Steps

1. 1Activate Daretti's second ability by removing two loyalty counters from them, sacrificing any other nonland permanent and returning Spark Double from your graveyard to the battlefield.
2. 2Spark Double enters the battlefield as a nonlegendary copy of Daretti.
3. 3Activate Spark Double's second ability by removing two loyalty counters from it, sacrificing Spark Double and returning Felidar Guardian from your graveyard to the battlefield.
4. 4Felidar Guardian enters the battlefield, blinking Daretti.
5. 5Repeat, sacrificing Felidar Guardian in step 1.

Effects

• Infinite creature ETB
• Infinite creature LTB