The Ooze, Shilgengar, Sire of Famine, March of the Machines, and Gev, Scaled Scorch

Prerequisites

• The Ooze on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• March of the Machines on the battlefield
• Gev, Scaled Scorch on the battlefield

Steps

1. Activate Shilgengar by sacrificing a creature with a +1/+1 counter on it
2. When that creature dies, The Ooze triggers, creating a Mutagen artifact token for each +1/+1 counter on the sacrificed creature
3. These artifacts are also 0/0 creatures due to March of the Machines
4. Each Mutagen artifact creature token enters with at least one +1/+1 counter on it due to Gev
5. Resolve the Shilgengar ability, creating a Blood token
6. Repeat from step 1
7. Activate Shilgengar's first ability by sacrificing another creature, creating a Blood token
8. The Blood token enters the battlefield as a 0/0 creature due to March of the Machines, and will have its toughness boosted by the permanent specified in the pre-requisites to prevent it from dying
9. Repeat

Results

• Infinite Blood tokens
• Infinite Mutagen tokens
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers