This card uses casualty , which allows you to sacrifice a creature to copy the spell
Its important to remember that while you do get fewer cards in Japanese booster packs, you are more likely to get rare cards
As another example, if my opening hand has a one-drop, a two-drop, a three-drop and four different four-drops, then I will usually bottom the worst three four-drops in the hope of drawing into a powerful five or six-drop, while keeping the cards that will ensure a perfect 1-2-3-4 curve-out
The commander may be a game-ending threat by itself or provide the ability to snowball fast via the advantage they can generate
Since Pot of Greed always replaces itself, there's rarely if ever a reason to not play it
But this card is so strong that its deck is simply called Gren Maju