The idea, at the time, was that we could create some extra layered complexity by having cards that could take advantage of the fact that most creatures have two creature types on them
The Rarity Levels Explained Disney Lorcana offers six rarity levels and they are set up depending on how difficult it is to get the cards
"We had already seen two-headed slivers, two-clawed slivers, two-tailed slivers, brainy slivers, leafy slivers, spiky slivers - a lot of variations on that one design." The decision to switch to a totally new Sliver was a controversial one, and thankfully, it seems like WotC received the message loud and clear
This is a pretty classic Sultai build
Control decks in Standard get some pretty useful tools going forward
Ravnica is a unique plane in that it harbors ten guilds, each defined by a different two-color identity