2012-10-01 : Blistercoil Weird will get +1/+1 and untap before that instant or sorcery spell resolves.

2012-10-01 : Blistercoil Weird will get +1/+1 even if the instant or sorcery spell is countered or if Blistercoil Weird is untapped when its ability resolves.

2012-10-01 : If you copy an instant or sorcery spell on the stack (using Nivix Guildmage’s second ability, for example), the copy isn’t cast. Blistercoil Weird’s ability won’t trigger.