Elenda, the Dusk Rose, Haakon, Stromgald Scourge, and Phyrexian Altar

Prerequisites

• Elenda, the Dusk Rose on the battlefield
• Haakon, Stromgald Scourge on the battlefield
• Phyrexian Altar on the battlefield
• Elenda has a power of three or greater
• available

Steps

1. Activate Phyrexian Altar by sacrificing Elenda, adding
2. When Elenda dies, its second ability triggers, creating a number of 1/1 Vampire creature tokens equal to Elenda's power
3. Cast Elenda from your graveyard by paying
4. Activate Phyrexian Altar three times by sacrificing three Vampires, adding
5. When the Vampires die, Elenda's first ability triggers three times, putting three +1/+1 counters on it
6. Repeat

Results

• Infinite +1/+1 counters on Elenda
• Infinite colored mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count