Zameck Guildmage, Lesser Masticore, and Ashnod's Altar

Prerequisites

• Zameck Guildmage on the battlefield
• Lesser Masticore on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Zameck Guildmage's first ability by paying , causing each creature you control to enter the battlefield with an additional +1/+1 counter this turn
2. Activate Ashnod's Altar by sacrificing Lesser Masticore, adding
3. Lesser Masticore dies, triggering its persist ability, returning it from your graveyard to the battlefield with no -1/-1 counters due to Zameck Guildmage
4. Repeat from step 2

Results

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