Addon

[Warninglolz]

Hello, im looking for an addon that will tell me when the buff (like horn of winter, lock portal) will be about to expire. I was trying with PowerAurasClassic but it seems that it doesnt have such an option.

[smartjew]

Try quartz

[shadeguard]

Bonus question: Do I need an older version of Curse for it to be compatible with WotLK? Or can I just go on normally?

[Ekunn]

Hello, im looking for an addon that will tell me when the buff (like horn of winter, lock portal) will be about to expire. I was trying with PowerAurasClassic but it seems that it doesnt have such an option.

SatrinaBuffFrames makes it possible for you to filter (de)buff icons and put them anywhere on your screen, and is undoubtedly the most customisable addon for the purpose: SatrinaBuffFrames

Bonus question: Do I need an older version of Curse for it to be compatible with WotLK? Or can I just go on normally?

You don't even need Curse. Just files that are compatible with patch 3.3.5a or earlier.