Generating Energy swiftly and strategically plays a crucial role in powering up your core cards and dominating the pace of the matches
Assuming that the creatures that you copy also have triggered abilities, you might get a ton of value
I think most people agree that the Grixis deck was a bit more unfocused compared to the other options, but when built in their own shell, they are an absolute powerhouse
If an Xyz Monster you control would activate an effect by detaching material(s), except the turn this card was sent to the GY, you can banish this card from your GY instead of 1 of those materials
They can be mained as a sort of deck-thinning engine in a 4-Axis build, and can also function as Xyz Materials
You have to build around it, but doing so isn't hard when they keep pushing the power of 1-mana combat tricks like Rage and Turn Inside Out