The best card drawing card printed since Urza's Block, hands down, Fact or Fiction is at worst a five-card Impulse, and at the best as a three-card drawing machine
It requires both quite specific deckbuilding AND a good bit of luck or effort if you want to turn it on early in a game
it's something black can do, but it was harder to word and less flavorful
Overkill was leaked a while back, and most assumed it was a Limited filler card with some fun Final Fantasy flavor thrown in
The former is Black, Red, and Green with a theme of sacrificing lands, and the latter is Blue, Red, and White with a heavy artifact and counter theme
One of the coolest interactions you can do is with Chalice of the Void (where X is different from 1), casting Veil and making your spells uncounterable, blanking the Chalice