Shilgengar, Sire of Famine, and March of the Machines

Prerequisites

• Shilgengar, Sire of Famine on the battlefield
• March of the Machines on the battlefield
• You control a permanent that is boosting the toughness of all your creatures by at least 1, or that is giving a creature a +1/+1 counter as it enters the battlefield
• You control at least one additional creature

Steps

1. Activate Shilgengar's first ability by sacrificing another creature, creating a Blood token
2. 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
3. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers