Aminatou, the Fateshifter + Spark Double + Rings of Brighthearth + Teferi, Temporal Archmage

Aminatou, the Fateshifter

Spark Double

Rings of Brighthearth

Teferi, Temporal Archmage

How it works

1. Activate up to four permanents by tapping them, adding at least 2.
2. Activate Aminatou's second loyalty ability by removing a loyalty counter from it, targeting Teferi.
3. Rings of Brighthearth triggers, causing you to pay 2 to copy Aminatou's ability, targeting Spark Double.
4. Resolve both Aminatou abilities, blinking Teferi and Spark Double, choosing to have Spark Double enter the battlefield as a copy of Aminatou.
5. Activate Teferi's second loyalty ability by removing a loyalty counter from it, targeting up to four permanents.
6. Rings of Brighthearth triggers, choose not to pay for the trigger.
7. Resolve the Teferi ability, untapping up to four permanents you control.
8. Activate up to four permanents by tapping them, adding at least 2.
9. Activate Spark Double's second loyalty ability by removing a loyalty counter from it, targeting Teferi.
10. Rings of Brighthearth triggers, causing you to pay 2 to copy Spark Double's ability, targeting Aminatou.
11. Resolve both Spark Double abilities, blinking Teferi and Aminatou.
12. Activate Teferi's second loyalty ability by removing a loyalty counter from it, targeting up to four permanents.
13. Rings of Brighthearth triggers, choose not to pay for the trigger.
14. Resolve the Teferi ability, untapping up to four permanents you control.
15. Repeat.
16. If the four permanents can produce at least 3, you may instead use Teferi's first loyalty ability once you have infinite mana to put your library into your hand, or you may instead blink any other desired permanent.