Their biggest monsters also have the ability to take monsters from the opponent and use them as materials for their own Xyz
Mai only has one of each, so if you can get around them you will be in the clear
Thats the most conventional way to win, but Ive found myself with a different goal in mind: eliminating my opponents deck, which Gravekeepers Servant is excellent at
There are no restrictions on this card, so it can even fetch itself, which means if the player can Special Summon that Sapphire Pegasus, they can effectively thin their deck by two cards
Ill be looking at the number of cards in your hand and your opponents hand, the amount of value gained, and the overall impact on the game
If it is, you can look at the top 6 cards in your deck, reveal a Supporter, and put it into your hand