Tidespout Tyrant + Mox Amber

Tidespout Tyrant

Mox Amber

How it works

1. Cast Mox Amber by paying its mana cost.
2. Tidespout Tyrant triggers, returning a nontoken permanent from the battlefield to your hand.
3. Activate Mox Amber by tapping it, adding one mana of any color among legendary creatures and planeswalkers you control.
4. Cast the nontoken permanent returned in step 2 by paying its mana cost.
5. Tidespout Tyrant triggers, returning Mox Amber from the battlefield to your hand.
6. Repeat.