On top of that, Yorick's card pool contains a broad variety of powerful weapons all of which he's happy to play - Enchanted Blade, Baseball Bat, Meat Cleaver, etc
If your reanimation target isnt essentially paying for itself the moment it touches the battlefield, then it should either be individually hard to kill, feature some extremely potent reward for keeping it around, or both
4 sizes available
It is a great counter against combo decks that seem to go on forever
From here, the cards controller will be able to cast it from exile transformed, without paying its mana cost
The Simic decks centered around Uro and Field of the Dead would often play Growth Spiral as well, so Field of the Dead could come online as early as turn five