Halana, Kessig Ranger, Soul Collector, and Ashnod's Altar

Prerequisites

• Halana, Kessig Ranger on the battlefield
• Soul Collector in hand
• Ashnod's Altar on the battlefield
• available

Steps

1. Cast Soul Collector by paying
2. When Soul Collector enters the battlefield, Halana triggers, causing you to pay to have Soul Collector deal damage equal to its power to itself
3. Activate Ashnod's Altar by sacrificing Soul Collector, adding
4. When Soul Collector dies, it triggers, returning itself from your graveyard to the battlefield
5. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers