UW: Skies UB: Graveyard BR: Aggro RG: 4+ Power GW: +1/+1 Counters BW: Life gain UR: Spells BG: Morbid RW: Aggro UG: Ramp Each and every one of them is very easy for a new player to understand, while also conveying the flavor and mechanical themes of each color pair
Then if there are twenty or more cards in your graveyard, you may play the exiled card without paying its mana cost
There are a multitude of different artifact decks that can make excellent use of its abilities, particularly that third one, and it may well allow for some truly nauseating combos
It might only change things by a small amount, but for a lot of decks it could lead to some amusing decisions, at least during the games themselves
You do get to draw a card
The bad thing is that decks with too much graveyard hate are screwed against other decks, and those with too few are screwed against graveyard decks like Karador