Rosie Cotton of South Lane, Phyrexian Altar, and Triskelavus

Prerequisites

• Rosie Cotton of South Lane on the battlefield
• Phyrexian Altar on the battlefield
• Triskelavus on the battlefield
• available

Steps

1. Activate Triskelavus' first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Triskelavite creature token
2. Rosie triggers, putting a +1/+1 counter on Triskelavus
3. Activate Phyrexian Altar by sacrificing the Triskelavite, adding
4. Repeat

Results

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