Elemental Invasion Phase 4, or "Get a Feat of Strength"

Every 2-3 hours, all over the city.  The elementals invade the cities only every 2-3 hours and when they arrive (after a 5 minute warning) they're everywhere.  No way to miss them.

• Orgrimmar & Ironforge: Earth and Fire rifts
• Thunder Bluff & Stormwind: Water and Wind rifts

By defending your faction's cities and getting the buffs for closing all the types of rifts, you earn Tripping the Rifts, a once-in-a-lifetime pre-expansion Feat of Strength.  While waiting, you can do the quest chains if you haven't yet, or do some of the new quests.

I may have time later this week to map those quests out, but not tonight, alas.

Things I wasn't sure about until I did it:

1. You do not need to be in a raid to get the buff.
2. You get the buff when the elementals stop spawning (i.e. when the rift closes).
3. The buff hits an area of people, so you need to be nearby when the rift closes.
4. You can (and probably will) get both buffs in one city defense event.

Therefore, you only need to do your (two) available cities once each.

And then after the event you can queue for the specially available bosses.  (LFD or the portals in the city.)