If Legacy Weapon would be put into a graveyard from anywhere, reveal Legacy Weapon and shuffle it into its owner's library instead. Add one colorless mana to your mana pool. Caves of Koilos deals 1 damage to you. I find these cards very believable. The wordings are credible, and the cards follow the concept of the 2 latest editions.
Some cards are really strange though.
I copied the list from the rummors mill on Beyond Dominia. At the beginning of your upkeep, you draw a card and you lose 1 life. Guided Passage URG Sorcery Reveal the cards in your library. An opponent chooses from among them a creature card, a land card, and a noncreature, nonland card. You put chosen cards into your hand.