Untrue. Played from graveyard has been stated to not be a deploy condition.
Used to be when you raised Sacullas that he'd trigger.
IDK if it still is.
Yes, it is true that Graveyard -> Support Zone is not a deploy, but if the card states that it is going to the Deployed Zone, the effect will activate. They are two very different things. This is still correct for both Sacullas and Lucca. This is because, as stated, their ability is activated when they enter a Deployed Zone. The Deployed Zones are Support Zone, Assault Zone, and Defense Zone.
Untrue. Played from graveyard has been stated to not be a deploy condition.
Then what about Zombie Abomination getting his buffs and removing all other characters in the Grave when he is Awakened from the Grave? His text states that "When you play Zombie Abomination..." instead of 'deploy', but unless I'm mistaken, they're interchangeable.
This is bad wording. Either it's effect doesn't match the text or its text doesn't match the effect, but something is wrong. Being raised from the graveyard is not a deploy. A bunch of evidence includes having more than one Unique character and that "when you deploy" effects do not trigger, such as Cornicen. Zombie Abomination is an oddball exception that probably stems from when the wording was switched over or is just incorrect.
This isn't entirely bad wording. He is entering the Deployed Zone. As I said above, there is a difference between the words "deploy" and "entering a deployed zone" (kinda). Zombie Abomination and Cornicern have two different ability triggers.
I'm asking because I noticed that if Nysrugh the Hungry is deployed and he eats a demon demonic disciple (killing it) when Nysrugh dies and the demon come back from the graveyard the demonborn get the buff. And btw it does not get buffed by creature in command zone.
I'm going to address both your statement aswell as Vertu's. Demonborn's ability states that, "When you
deploy a Demon, Demonborn gains +1/+1." As I mentioned above, there is a difference between deploying and having a character enter a deployed zone.
Now, currently Demonborn gains +1/+1 for other Demons paying their Exile cost (such as Unstable Demon). This does not seem intended. Let's just say this is intended, though (some things would need cleared up). The reason Demonborn is not specifically gaining buffs from Demonic Disciple is because when he is "deployed from the graveyard with the Exile cost", he enters as a human and then transforms after being "deployed". The reason Nysrugh spitting up the demon Demonic Desciple is because, well, its a demon at that point. The fact that Nysrugh's death gives boosts is not intended, either (or shouldn't be based on the definition of a deploy).
I hope I helped clear some things up. Some of these things need to be reworded and looked at so that "deploying" and "a character entering a deployed zone" are cleared up.