It may not be better than Nekrataal due to lack of first strike but just murdering something is strong
At 360, I won't want Ravenous Chupacabra, Skinrender, AND Nekrataal, but I'm not quite sure which two I like best yet. They each have their pros and cons.
Skinrender has the most relevant body and -3/-3 is usually enough to get the job done.
Chupacabra has the least-conditional 187 effect but leaves behind a vanilla 2/2.
Nekrataal's ETB really only feels bad vs other Bx decks and first-strike makes it a formidable blocker and a decent threat, but its a bit weaker to cards like Cunning Sparkmage and Darkblast.
It is one of my favorite cards. It's the best ramp finisher in my opinion, much better for this purpose than Pelakka Wurm or any other card. Turning a bunch of mana dorks, Eldrazi tokens etc into an army of Air Elementals is game over for your opponent. You can deal with a single Plated Crusher or Ulamog's Crusher, but there is not much you can do against 3-4 Air Elementals in CU/be. Plus if you are the defending player and about to lose it's even better than if you are on offense and already winning anyway (very much unlike the previously mentioned finishers).
I would probably even run the card if that was the only purpose of it, but it's also versatile and scaleable. Very easy to get a pseudo 2 for 1 with it. Just turn your Omenspeaker into an Air Elemental to kill their Aerial Responder or upgrade your Skyship Plunderer to an Air Elemental when it is about to get hit by a Lightning Bolt. You can cast it for 3, 5, 7, 9 or even 11 mana (seen that), it is whatever you need it to be when you need it. Theoretially you can even target your opponent's creature as well (like turning an Artisan of Kozilek into an Air Elemental), but admittedly that's something that rarely makes sense.
It's exactly what I want from a Magic card. It can be used in a lot of different ways, it's fun, you can build around it, but you don't have to. I pick this very highly during draft, one of my favorite decks is ramp with Mystical Tutor + Hour of Need + all the mana dorks/green small dudes/blue utility creatures I can get. But I would put it into any relatively slow deck that runs enough creatures, especially tokens and/or utility creatures like Omenspeaker, Sea Gate Oracle, Merfolk Looter, Eldrazi Skyspawner and so on. The card will not leave my cube anytime soon.
This has been my experience with Hour of Need as well.
I've not had a chance to play with Oketra's Monument but have been considering cutting Shrine of Loyal Legions for power reasons. Maybe Monument is the "fixed shrine" I've been looking for?
At 360, I won't want Ravenous Chupacabra, Skinrender, AND Nekrataal, but I'm not quite sure which two I like best yet. They each have their pros and cons.
Skinrender has the most relevant body and -3/-3 is usually enough to get the job done.
Chupacabra has the least-conditional 187 effect but leaves behind a vanilla 2/2.
Nekrataal's ETB really only feels bad vs other Bx decks and first-strike makes it a formidable blocker and a decent threat, but its a bit weaker to cards like Cunning Sparkmage and Darkblast.
This has been my experience with Hour of Need as well.