Prophecy, Warriors had Might, and so forth. This was called tier 1.
- It was obtained via multi-class tokens. The bosses would drop, say, the belt token for Priest, Mage, and Warlock. You'd then have to take the token, some mats dropped by Naxx trash, and some crafting mats to an NPC to get the gear. This was useful because the boss drops became more flexible: if your priests all had their belt already, you could give the token to a mage or a warlock; if it had just been a straight drop of the priest T3 belt, you'd have to disenchant it.
- T1 and T2 filled eight slots, while T3 filled nine, adding a ring. However, the highest bonus was for eight pieces, so you could choose which piece you wanted to leave out and still get the set bonus. This is continued in BC with five-piece sets, but only two- and four-piece bonuses.
- When Wrath of the Lich King goes live (or possibly when patch 3.0.2 does) you will no longer be able to acquire T3. Naxxramas is being moved from its current location up to Northrend, where it will become the entry-level raid for level 80. Those who already have T3 will get to keep it.