Prerequisites
- Life and Limb on the battlefield
- Draconic Visitor on the battlefield
- Sarinth Greatwurm on the battlefield
- Leyline of Transformation on the battlefield
Steps
- Cause a creature or land to enter under your control
- Each permanent that entered is a Saproling through Leyline of Transformation and a Forest in addition to its other types due to and Life and Limb, causing Sarinth Greatwurm to trigger
- Resolve a Sarinth Greatwurm trigger, replacing the artifact token creation with that many 5/5 Dragons through Draconic Visitor
- Repeat steps 2-3
- Unless you have a way to remove one of the pieces, this will cause an infinite mandatory loop and draw the game
Results
Required Cards 4

Life and Limb
Enchantment

Draconic Visitor
Creature — Dragon

Sarinth Greatwurm
Creature — Wurm

Leyline of Transformation
Enchantment