Zameck Guildmage, Glen Elendra Archmage, and Ashnod's Altar

Prerequisites

• Zameck Guildmage on the battlefield
• Glen Elendra Archmage 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 Glen Elendra Archmage, adding
3. Glen Elendra Archmage 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