Skirk Prospector, Putrid Goblin, and Zameck Guildmage

Prerequisites

• Skirk Prospector on the battlefield
• Putrid Goblin on the battlefield
• Zameck Guildmage on the battlefield
• Putrid Goblin does not have a -1/-1 counter on it
• available

Steps

1. Activate Zameck Guildmage's first ability by paying
2. Activate Skirk Prospector by sacrificing Putrid Goblin, adding
3. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Zameck Guildmage
4. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite red mana