Twinflame, Priest of Urabrask, Ardent Elementalist, and Reverberate

Prerequisites

• Twinflame in hand
• Priest of Urabrask on the battlefield
• Ardent Elementalist on the battlefield
• Reverberate in hand
• available

Steps

1. Cast Twinflame by paying , targeting any two creatures
2. Holding priority, cast Reverberate by paying its mana cost, copying Twinflame, with the copy targeting Priest of Urabrask and Ardent Elementalist
3. Resolve the copy of Twinflame, creating a token copy of Priest of Urabrask and Ardent Elementalist with haste
4. When the Priest of Urabrask and Ardent Elementalist tokens enter, they trigger
5. Resolve the Priest of Urabrask trigger, adding
6. Resolve the Ardent Elementalist trigger, returning Reverberate from your graveyard to your hand
7. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Infinite red mana
• Infinite creature tokens with haste
• Infinite magecraft triggers