Reyhan, Last of the Abzan, Bartolomé del Presidio, Scurry Oak, and Grumgully, the Generous Combo

Reyhan, Last of the Abzan, Bartolomé del Presidio, Scurry Oak, and Grumgully, the Generous

Here's how the cards Reyhan, Last of the Abzan, Bartolomé del Presidio, Scurry Oak, and Grumgully, the Generous results in Infinite +1/+1 counters on a creature, Infinite ETB, Infinite LTB, Infinite death triggers, and Infinite sacrifice triggers

Reyhan, Last of the Abzan

Bartolomé del Presidio

Scurry Oak

Grumgully, the Generous

Prerequisites

Reyhan, Last of the Abzan on the battlefield
Bartolomé del Presidio on the battlefield
Scurry Oak in hand
Grumgully, the Generous on the battlefield
available

Steps

Cast Scurry Oak by paying its mana cost, causing it to enter with +1/+1 counter(s) due to Grumgully
When Scurry Oak enters, it triggers, creating a creature token that enters with +1/+1 counter(s) due to Grumgully
Activate Bartolomé del Presidio by sacrificing the creature token
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 Grumgully
Resolve the Bartolomé del Presidio ability
Repeat from step 3