It also has flying and only needs a single creature to crew it, so its super reliable
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Yami Bakura got rid of Ra as a Tribute to Summon "The Dark Ruler", thinking that no one could use Ra buried in the Graveyard but Marik brought Ra back from the Graveyard with "Monster Reborn", revealing Ra's Point-to-Point Transfer abilities to win the Duel, resulting in Yami Bakura's destruction
Instead of having to draw a specific card dedicated to being a resource and play it each turn, or generating a set amount of resource as per Legend of the Five Rings, the game is a constant back and forth of giving and taking memory, trying to be efficient in your moves and denying your opponent as much memory as possible to use on their turn
For the yard you'll never leave
But as a pure beater, its very good with reach not being flavor text either