Text (ON+errata): For each opponent, gain control of target permanent that player controls. (This effect lasts indefinitely.) [Oracle 2009/07/08]
You gain control of only one permanent from each player. [Onslaught FAQ 2002/09/24]
If a permanent changes controller after being targeted but before this spell resolves, you won't gain control of that permanent. [Onslaught FAQ 2002/09/24]
