It doesnt replace returning the Zombie card to your hand
Even for the same character, the price difference becomes extremely large depending on specification variations
The current mulligan rules punish unfortunate shuffling techniques a lot less, and set designs includes cards that help to avoid mana screws and mana floods
Practically the only card with shadow that sees play is Dauthi Voidwalker, so shadow essentially makes your creature unblockable
It should go well in the white/black graveyard matters constructed deck, and it can also be sideboarded against it or any other graveyard matters constructed deck, and in any format
I tend to copy objects out of my dice bowl rather than dragging them out of the bowl, but it's nice to have those readily available instead of having to dig through the components section of the objects menu - even reading that sentence is awkward