Rona, Herald of Invasion // Rona, Tolarian Obliterator + Mox Opal + Retraction Helix

Rona, Herald of Invasion // Rona, Tolarian Obliterator

Mox Opal

Retraction Helix

How it works

1. Activate Mox Opal by tapping it, adding .
2. Cast Retraction Helix by paying , targeting Rona.
3. Activate Rona by tapping it, returning Mox Opal from the battlefield to your hand.
4. Cast Mox Opal by paying 0.
5. Rona triggers, untapping itself.
6. Activate Mox Opal by tapping it, adding one mana of any color.
7. Repeat from step 3.