Criteria: Creatures that cost less than three mana with either an enters-the-battlefield, dies, or leaves-the-battlefield trigger that can put a land onto the battlefield, into your hand, or on top of your library
[EDITORS NOTE heres the other one, for the curious] Taking after the original Millstone and Grindstone, this artifact offers the perfect blend of simple enabler and combo-riffic payoff
Despite this, it remains an iconic and strategically valuable card in Yu-Gi-Oh
But averages hide the real story
That means if you can turn even a single card to defense position and make its DEF 0, one attack from Chaos MAX dragon will result in 8000 damage, which is usually a win
Theres also a subtheme of creature tapping, evident on some of the cards in the 99