While it may not explode onto the battlefield as fast as some other payoffs, it gives you inevitability, which forces opponents to answer your massive threats or drown under the weight of your cycling engine
Cloudstone Curio is a little pricey of a combo to fit into a budget build, as I dont like to play such combos unless I can also add relevant high power pieces such as tutors and cards like Dockside Extortionist which is also another great option to Offspring
It was pretty fun to get home and find it in my mailbox
Sheoldreds core text: - Whenever *you* draw a card you gain 2 life
Cut tight to the card so the top edge stays fully covered once you add a standard sleeve over it
Payoffs like Haruspex, Deathbringer Thoctar, Sadistic Glee or Blade of the Bloodchief can even trigger off opposing permanents, which makes them nasty for multiplayer even if your own engine is completely stalled