Radiant Solar must be on the field before the combo begins
Cast either Aminatou first and then play Felidar Guardian, or you can cast Felidar Guardian first and then Aminatou
1. Activate Aminatou's -1 ability to exile Felidar Guardian and return it to the battlefield
2. Felidar Guardian returns and blinks Aminatou, allowing you to repeat the -1 ability
3. With the infinite ETB you can infinitely go into the dungeon "The Lost Mind of Phandelver" for infinite scrying, produce an infinite amount of treasure tokens, drain the table of all their life, infinitely gain life, and draw out your deck until you choose to stop activating Aminatou.