6 mana 6/6 taunt with such battlecry is stronger than a legendary card. Your idea needs to be nerfed big time
Why? 6/6 for 6 is vanilla (aka not very good) and battlecry would be strong only against spell-heavy deck (like Mage or Token Druid). Against "normal" decks it would be like 4-6 armor on average and sometimes even 0-2. It's not like auto-include card, great in any deck, because it's rather slow. Also Illidari Inquisitor is a rare, so I don't see a problem here at all.
Why? 6/6 for 6 is vanilla (aka not very good) and battlecry would be strong only against spell-heavy deck (like Mage or Token Druid). Against "normal" decks it would be like 4-6 armor on average and sometimes even 0-2. It's not like auto-include card, great in any deck, because it's rather slow. Also Illidari Inquisitor is a rare, so I don't see a problem here at all.
I'll just post my idea again: