Rings of Brighthearth + Deserted Temple + Serra's Sanctum

Rings of Brighthearth

Deserted Temple

Serra's Sanctum

How it works

1. Activate Serra's Sanctum by tapping it, adding at least .
2. Activate Deserted Temple's second ability by paying 1 and tapping it, targeting Serra's Sanctum.
3. Rings of Brighthearth triggers, causing you to pay 2 to copy Deserted Temple's ability, targeting Deserted Temple.
4. Resolve both Deserted Temple abilities, untapping Deserted Temple and Serra's Sanctum
5. Repeat