I know pickled brain, geo, and codex does. When I'm dominating a mid war, and someone won't concede, I'd like to make my 6k moneys into something fun. Anything else?
Forget the items, make an army of 9000 winged cour, put a picked brain and a codex lvl 5 on each and let the battle begin.
Use your courier to backdoor using puzzlebox, abyssal skull, sol's and plated greaves.
Auras, items that give +health/mana (not % or stats) and activation items if they have whats required to activate i believe? ;O
If I use codex with my hero, and pass it to my courier, does the item still work? Does the courier have the same cooldown as me, or can I codex twice by swapping between us?
Eye does work on courier and so do items that require activation (as long as courier has some mana!!!!)