It's a good thing Duel Links is free, otherwise it would be tough to recommend to anyone
If you get a premium account, you unlock additional features like a custom set marker
This creature definitely looks like it came from the underworld
In the anime though, Exodia Necross' mechanics are altered somewhat even though the summoning condition is the same where each of the Exodia pieces in the Graveyard grants Necross a different effect: "Exodia the Forbidden One" makes Necross immune to destruction by battle, "The Left Leg" renders it invulnerable to destruction by Spell Cards, "The Right Leg" protects it from destruction by Trap Cards, "The Left Arm" shields it from destruction by effects from Monsters, and "The Right Arm" grants Necross 1000 ATK every time it's in battle at the end of the Damage Step
Yusei requests that they evacuate Satellite, but Goodwin says can't, since it would allow the Dark Signers to target the city, ensuring a greater amount of casualties
The extra trample text is quite nice with both itself and other green beaters