Thought I'd record my progress through the Temples as they don't actually tell you.

Temple of Transubstantiation - Level 1 and doubt I'll be getting far with this one.

Temple of Transmogrification - Level 1 but I do have 1 hieroglyphic so fingers crossed I get the other 2 soon.

Temple of Transformation - Level 7 but I haven't got any keys for a while from the dig but I have 3 keys to trade still.