Yedora, Grave Gardener, Storm Cauldron, and Walking Ballista

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Storm Cauldron on the battlefield
• Walking Ballista in hand

Steps

1. Cast Walking Ballista by paying
2. Walking Ballista enters the battlefield and dies as a state-based action due to having zero or less toughness
3. Yedora triggers, returning Walking Ballista from your graveyard to the battlefield face down as a Forest land
4. Activate Walking Ballista by tapping it, adding
5. Storm Cauldron triggers, returning Walking Ballista from the battlefield to your hand
6. Repeat
7. Once you have infinite green mana, you may use it to cast Walking Ballista for an arbitrarily large amount of mana, and then use its ability to deal infinite damage to any target(s)

Results

• Infinite +1/+1 counters on Walking Ballista
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite green mana
• Infinite landfall triggers
• Infinite LTB
• Infinite storm count