The real creepy implication here, in my mind, is the lore of a Planeswalker using some real shady necromantic magic to bring creatures back to life straight from the graveyard
Other cards, like Hedron Archive, are perfectly acceptable in a non-Green deck, but we have plenty of better alternatives at the same budget range, like Explosive Vegetation
Double strike and trample is brutal enough, but then you take into consideration that it can be cast for as cheap as and attaches itself immediately to one of those unblocked attacking creatures
But on worlds like Kaladesh, Ravnica, or some parts of Dominaria, I could see the case being made that they would bring a good sense of flavor to a world, telling the audience something bold or subtle about the place we are visiting
Running a five-color deck, however, means you have to carefully calculate the mana costs across all of your cards and balance your lands and other mana-generators accordingly
Stangg is the one