Genestealer Patriarch, Phyrexian Altar, Reluctant Role Model, and Rikku, Resourceful Guardian

Prerequisites

• Genestealer Patriarch on the battlefield
• Phyrexian Altar on the battlefield
• Reluctant Role Model on the battlefield
• Rikku, Resourceful Guardian on the battlefield
• available

Steps

1. Declare Genestealer Patriarch as an attacker
2. Genestealer Patriarch's first ability triggers, putting an infection counter on a creature an opponent controls
3. Activate Rikku's ability by paying its cost, moving the infection counter from the opponent's creature onto a creature you control
4. Activate Phyrexian Altar by sacrificing the creature with an infection counter on it, adding one mana of any color
5. When the creature dies, Reluctant Role Model and Genestealer Patriarch's second ability trigger
6. Resolve the Reluctant Role Model trigger, putting an infection counter onto another creature you control
7. Resolve the Genestealer Patriarch trigger, causing you to create a token copy of the sacrificed creature that is a Tyranid in addition to its other types
8. Repeat from step 4

Results

• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers