By combining early game ramp with cost-reducers like Dragonspeaker Shaman and Dragonlord's Servant, you will accelerate into terrifying aerial threats like Atarka, World Render and Drakuseth, Maw of Flames
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
This alone is almost worth a permanent
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
The drawback is that the creature is sacrificed as soon as it enters the battlefield
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