[quote=Mtntopview]
What if he surrounded it with the Matrix? Their powers negating eachother
[/quote]

They might negate, or they might react explosively. The Matrix, by nature, will attempt to stabilize the Sliver. The Sliver, by nature, will retaliate, seeing this as an attack. A power struggle would commence which might be completely invisible to the naked eye, or might blow the planet to shreds.