exactly! 1 Tier higher.. 10man Ulduar ilvl equals to 25man Naxx, and 25man Ulduar is 1 ilvl Tier higher than Naxx 25. And ofc the endboss will be ilvl 226 in 10man, and ilvl 239 (?) in 25man.... can't wait to see THOSE items. :Originally Posted by Ares42
but back to "topic"... I don't think anyone will be upgrading from 5man heroic rewards to 25man Ulduar rewards... but good luck, if you trying it!