Repay in Kind – Rise of the Eldrazi rare. From the Rise of the Eldrazi FAQ: For a player's life total to become a certain number that's lower than his or her current life total, what actually happens is that the player loses the appropriate amount of life. For example, if the lowest life total in the game is 5 and another player has 12 life, Repay in Kind will cause that player to lose 7 life. Abilities that interact with life loss will interact with this effect accordingly.
Lighthouse Chronologist – Rise of the Eldrazi mythic rare. From the Rise of the Eldrazi FAQ: In a two-player game, if you have a level 7 Lighthouse Chronologist and there are no other extra-turn effects, the game will proceed like this (with extra turns in brackets): your turn, your opponent's turn, [your turn], your turn, your opponent's turn, [your turn], your turn, your opponent's turn, and so on.
Forked Bolt – Rise of the Eldrazi uncommon. From the Rise of the Eldrazi FAQ: You divide the damage as you cast Forked Bolt, not as it resolves. Each target must be assigned at least 1 damage. (In other words, as you cast Forked Bolt, you choose whether to have it deal 2 damage to a single target, or deal 1 damage to each of two targets.)
Hellcarver Demon – Rise of the Eldrazi mythic rare. From the Rise of the Eldrazi FAQ: You cast nonland cards from exile as part of the resolution of Hellcarver Demon's ability. You may cast those cards in any order. Timing restrictions based on the card's type (such as creature or sorcery) are ignored. Other restrictions are not (such as "Cast [this card] only before the combat damage step"). You cast all of the cards you like, putting them onto the stack, then Hellcarver Demon's ability finishes resolving.
Angelheart Vial – Rise of the Eldrazi rare. From the Rise of the Eldrazi FAQ: If you're dealt enough damage to reduce your life total to 0 or less, you'll lose the game before you can put charge counters on Angelheart Vial.
Escaped Null – Rise of the Eldrazi uncommon. A null is what happens when a regular Zendikar vampire drains enough blood from a sentient creature. To get a vampire instead of a null, the blood has to be drained by a Bloodchief.
Ulamog, the Infinite Gyre – Rise of the Eldrazi mythic rare. Ulamog, the monstrosity whose half-forgotten name came to be known as the merfolk sea god Ula, is emblematic of plague, the blind bonds between parasite and host, and overabundance. Ulamog is creation and destruction wrapped together in unholy harmony.
Mox Lotus – Unhinged rare. Un-cards don’t have Oracle wordings, so Mox Lotus is left with a line of text that is now just a game rule, like "Each creature assigns combat damage equal to its power." This also happens on Nirkana Revenant, although there the card's text actually does something.
Endless Cockroaches – Portal rare. Portal used different terminology from regular Magic, including calling the graveyard the "discard pile". Between that and the changes in regular Magic lingo, this relatively straightforward card has only seven words (not counting "Endless Cockroaches" in common between its printed and Oracle text.
Infinite Authority – Legends rare. We're going to be honest with you. We tried pretty hard to come up with something to say about Infinite Authority, but all we can come up with is "Wow. Legends, huh?"
Frankenstein's Monster – The Dark rare. In the early days of Magic (which you could describe as The Dark days if you wanted to), cards took inspiration from all over. Sometimes, as in the case Frankenstein's Monster, the inspiration was kind of obvious.
Bosh, Iron Golem – Mirrodin rare. Here at Card of the Day, we like it when flavor text explains the action on the card: As Glissa searches for the truth about Memnarch, Bosh searches to unearth the secrets of his past.
Wall of Earth – Legends common. Wall of Earth is nice and straightforward: a large wall for a low price. It seems like the sort of card you'd expect to see from the days of Legends. Strangely, though, there was already an Wall of Stone in the same color in every core set from Alpha through Fifth Edition, so Wall of Earth probably wasn't strictly necessary.
Razia, Boros Archangel – Ravnica: City of Guilds rare. To quote Matt Cavotta, "Razia has been the heart and soul of the Boros guild since the signing of the guildpact. She is more like a demi-god to the army than a military leader, inspiring greatness and giving hope, meaning, and destiny to her Boros devout. Just to keep the black-hearted honest, she does, on occasion, rip the battlefield with holy fire."