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

Vivi Ornitier

Agatha's Soul Cauldron

Geralf, the Fleshwright

Mystic Speculation

How it works

1. Cast Mystic Speculation with buyback by paying 2.
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 0, adding at least 2
6. Repeat.

This clever alchemy centers on Agatha's Soul Cauldron, which allows your creatures with +1/+1 counters to inherit Vivi Ornitier's powerful mana-generating activated ability. By casting Mystic Speculation repeatedly using its buyback cost, you continuously trigger Geralf, the Fleshwright to produce Zombie Rogue tokens that enter the battlefield and immediately receive +1/+1 counters. Those counters grant the tokens access to Vivi Ornitier's ability, letting you tap them for mana to fuel the next Mystic Speculation and generating an infinite loop of spells, tokens, and mana.