Reyhan, Last of the Abzan, Ashnod's Altar, Scurry Oak, and Bioengineered Future

Prerequisites

• Reyhan, Last of the Abzan on the battlefield
• Ashnod's Altar on the battlefield
• Scurry Oak in hand
• Bioengineered Future on the battlefield
• available

Steps

1. Cast Scurry Oak by paying its mana cost, causing it to enter with +1/+1 counter(s) due to Bioengineered Future
2. When Scurry Oak enters, it triggers, creating a creature token that enters with +1/+1 counter(s) due to Bioengineered Future
3. Activate Ashnod's Altar by sacrificing the creature token
4. When the creature token dies, Reyhan triggers, putting +1/+1 counter(s) on Scurry Oak Scurry Oak triggers, creating a creature token that enters with +1/+1 counter(s) due to Bioengineered Future
5. Repeat from step 3

Results

• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers