Text (UG+errata): Counter any spell unless its caster asks your permission to play that spell. If you refuse permission, Sacrifice ~this~ and counter the spell. [Oracle 2009/07/08]
This affects all spells, even yours. So you need to ask yourself permission. [QAS 1998/09/09]
If the player doesn't ask permission, then the spell is countered automatically. [Barclay 1998/08/13]
If there's more than one in play, you need to ask each player who controls one. [Barclay 1998/08/13]
All tournament formats have banned cards from Unglued.
