You can nab yourself a nifty Feat of Strength by finding destroying a rift of each of the 4 types of rifts. You should get it while you still can. It should be available till the next phase of the Pre-Cataclysm Events start, but that's no reason to wait. I had a pretty hard time getting it as I went for strictly Northrend Rifts. Some places you need to just camp until it spawns. The rifts spawn on approximately an hour long respawn timer, and if not defeated they will despawn in 10 minutes.
You can defeat rifts by killing the elemental spirits that they spawn. Upon defeating a rift you will get a buff, you do not need to have all 4 buffs at one time, and you can kill rifts anywhere in Azeroth and Outland where they spawn. You do not need to get the last kill on the rift, you just need to be in the area when it dies. Here's a macro to help you.
/cleartarget
/tar surging e
/tar searing e
/tar rumbling e
/tar gusting e
/stopmacro [@target, noexists]
/run PlaySound("RaidWarning")
You can find more about the Elemental Invasion as well as spawn locations for Rifts at Wowpedia Here







