Gretchen Titchwillow, Oboro Breezecaller, and Matzalantli, the Great Door // The Core Combo

Gretchen Titchwillow, Oboro Breezecaller, and Matzalantli, the Great Door // The Core

Here's how the cards Gretchen Titchwillow, Oboro Breezecaller, and Matzalantli, the Great Door // The Core results in Infinite card draw, Infinite draw triggers, and Near-infinite landfall triggers

Gretchen Titchwillow

Oboro Breezecaller

Matzalantli, the Great Door // The Core

Prerequisites

Gretchen Titchwillow on the battlefield
Oboro Breezecaller on the battlefield
Matzalantli, the Great Door // The Core on the battlefield

Steps

Activate The Core by tapping it, adding at least or
Activate a land that enters untapped by tapping it, adding at least
Activate Oboro Breezecaller by paying and returning the land that taps for from the battlefield to your hand, untapping The Core
Activate Gretchen by paying , causing you to draw a card and put the land from step 3 onto the battlefield
Repeat