Sure, some creatures are more useful than others, and you're limiting the number of times you can pull off various graveyard shenanigans, but if this isn't a major focus of your deck, who wouldn't like, say, a free Craterhoof Behemoth for a turn
Goreclaw's last ability affects only creatures you control with the appropriate power at the time it resolves
WWW - Ice Breath (40) Effect: Does 40 damage to 1 of your opponent's Pokemon chosen at random
The single green mana requirement means that it can be jammed into many decks, and often will be found as the only green card in a 5 color deck
Join best friends Kuromi, My Melody, and Hello Kitty as they venture into a very mysterious and very Kuromi carnival that seems to have popped up out of nowhere
The spells mentioned above won't be very good without a way to load your graveyard with threats