Forcing the opponent to discard an instant or sorcery removes an important damage spell, giving -2/-2 to a creature is likely to kill the majority of the creatures they field, and draining two life essentially undoes a spell's worth of damage
To do this, you will need to have creatures in play, be those permanent or tokens, so while card draw and stations are the primary mechanics, you'll still need to ensure you have ways of getting creatures into play and protecting them long enough to charge up your space stations
Rarity: R #: 140 Card Type: Enchantment Flavor: The astropath collapsed, his empty eye sockets aglow
Its also a fairly large creature as a 6/6 deathtouch for 5 mana
Having multiple Orb of Origins on the battlefield will have no additional effect on artifacts on the battlefield except that the Orb of Origins will also make each other mono and continuous
I have splashed green into decks before simply for Crop Rotation, all be it exclusively when I am abusing Tolarian Academy