Bigger on the Inside + Blossoming Tortoise + Deserted Temple + Rings of Brighthearth

Prerequisites

• You have at least one nonland card in hand.

Steps

1. 1Activate Deserted Temple's second ability by paying due to Blossoming Tortoise and tapping it, targeting itself.
2. 2Rings of Brighthearth triggers, causing you to pay to copy Deserted Temple's ability, targeting Deserted Temple.
3. 3Resolve the copy of Deserted Temple's ability, untapping it.
4. 4Activate Deserted Temple by tapping it, adding two mana of any color and causing the next spell you cast this turn to have cascade.
5. 5Resolve the Deserted Temple ability from step 1, untapping it.
6. 6Repeat.
7. 7Cast any nonland card from your hand by paying its mana cost, causing you to get infinite cascade triggers based off the mana value of that spell.

Effects

• Infinite cascade with mana value equal to the next spell you cast