quick note in regards to disclaimer #2- i think this is OK as long as you never intend on including the art in a submission to level 1.
quick rundown:
Geared for Battle: it makes sense, a weak 'other' buff card.
Insanity: forced discards have been discussed, and after a minor riot zanz removed them from cards in production, will probably never happen.
Libris Mortis: its kinda like my desecrated temple card, but definitively more powerful for a lower cost.
Reality Bubble: so its basically a sundial for virtually everything? not too much a fan.
Sacrifice to the Gods: so you kill one creature to find another creature to replace it with, essentially? its neat, but unfortunately i think it will be more used in death-trigger centered decks, which kinda ruins its charm.
Divine Guidence: kinda vanilla
Aether Rift: probably a bit too wacky, feels more like an entropy card, and honestly i have no idea of how to balance this.
Absorb: yep, its a heal more powerful than imrpoved heal combined with a perm destroy, gravity doesnt need more healing, especially since black hole is more relevant than ever with all of the rainbow decks out there.