All Sliver creatures have menace. (They can’t be blocked except by two or more creatures.)
"That which would be a fatal mutation in any other species is merely a source of new powers. I am intrigued, yet too fearful to examine it more closely."
—Rukarumel, field journal
Multiple instances of menace on the same creature are redundant.
01-07-2013
wotc
If the creature type of a Sliver changes so it's no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.