It can be a tricky graveyard enabler since you can activate it multiple times to set up a big Patriarch's Bidding or find a silver-bullet target to reanimate with Goryo's Vengeance
King Crab filled a very important niche for blue: a huge creature that could not only block opposing fatties, but send most of them straight back to the top of an opponent's deck
And if youre really ambitious (Bontu would be proud!), you can run Phage the Untouchable, who causes any opponent she deals damage to to immediately lose the game, but be careful that she doesnt make you lose first
For the general collector, sometimes the simplest solution is the best
Still, its a card that'll help you get to max speed and dish out some damage via its activated ability, and its good at different points of the curve
The colors are solid enough that you can't see the card through the back of the sleeve, which is a good thing