If an Adventure spell leaves the stack in any way other than resolving (most likely by being countered or by failing to resolve because its targets have all become illegal), that card wont be exiled and the spells controller wont be able to cast it as a permanent later
It's all a bit clunky, but immensely powerful if you pull it off, and at the very worst the Nantuko can start creating 1/1 tokens if it's sitting on board by itself
If youre the equipment's controller, you can equip it again to any of your creatures
When I achieve the capability to take infinite turns, I just tell the opponent as much and concede: The game is over at that point
A favorite for many players, its sometimes easy to forget that this amazing cascade commander is legendary
It's still every bit as powerful in Five Color as it ever was, but that has dropped it on my list today