Risk of Rain Origin Huntress

Origin is the Artifact you unlock for doing an all-other-Artfiacts-on run, and... it's not really worth it.

Every 10 in-game minutes, a portal appears on top of you, unleashing a few Purple Imps, which are just an upstatted and recolored version of the regular Imp enemy, and eventually the portal vanishes and an Imp Vanguard shows up... which itself is just an upstatted and recolored Imp Overlord.... except for some reason it can't do the eye beam attack, leaving it with just the charging melee attack and the flailing-at-its-feet melee attack.

That's it. That's all Origin does.

In practice, having Origin on is basically a slight decrease in difficulty, generally speaking. The Imp Vanguard is guaranteed to drop an additional item like any boss, and the Imp Vanguard and Purple Imps are almost never much of a threat by the time they actually manage to show up. So even though they don't dip into the director's points budget and so should be an increase in difficulty, or at least a trade-off, they're just... basically a free item.

There's some mildly interesting technical details to how the portal works, but it's really a fairly boring Artifact, and not particularly worth the effort involved in unlocking it.