Vivi Ornitier, Agatha's Soul Cauldron, Geralf, the Fleshwright, and Mystic Speculation

Prerequisites

• Vivi Ornitier in exile
• Agatha's Soul Cauldron on the battlefield
• Geralf, the Fleshwright on the battlefield
• Mystic Speculation in hand
• available

Steps

1. Cast Mystic Speculation with buyback by paying
2. Geralf triggers, creating a 2/2 Zombie Rogue creature token
3. When the Zombie Rogue enters the battlefield, Geralf's second ability triggers, putting a +1/+1 counter on the Zombie Rogue for each other Zombie that entered the battlefield under your control this turn
4. Resolve the Mystic Speculation spell, returning it to your hand
5. Activate the Zombie Rogue using Vivi's ability by paying , adding at least Repeat

Results

• Infinite ETB
• Infinite storm count
• Infinite red mana
• Infinite blue mana
• Infinite +1/+1 counters on an infinite number of creature tokens
• Infinite scry 3