I hope you get control over opponents creatures when they are rised...but the card doesn't say that unfortunatly...
Its covered in the Reanimate keyword.
Reanimate (Effect)
This creature reanimates upon death. If this creature is destroyed, it is moved from the discard pile to the zone it was just destroyed in,
and placed face down in that zone, with a face-down action marker
on it. This creature is considered temporarily out of play. At the end of the round, the creature card is flipped face up and is Summoned
into play. Reanimate does not occur if the creature is removed from the game when it is destroyed. See “Obliterate.”
So, since "you" (the caster) are performing the Reanimating , the creature is re-summoned as if it was yours.
So you can use this card to steal an opposing creature you kill, or can use it on a friendly creature to zombify it after its death.