Ygra, Eater of All, Camellia, the Seedmiser, and Phyrexian Altar

Prerequisites

• Ygra, Eater of All on the battlefield
• Camellia, the Seedmiser on the battlefield
• Phyrexian Altar on the battlefield
• You control at least one additional creature

Steps

1. Activate Phyrexian Altar by sacrificing any other creature, adding one mana of any color Because the creature is a Food due to Ygra, when it dies, Camellia and Ygra trigger
2. Resolve the Ygra trigger, putting two +1/+1 counters on it
3. Resolve the Camellia trigger, creating a 1/1 Squirrel creature token
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on Ygra
• Infinite +1/+1 counter on each Squirrel you control except Camellia