"This unit becomes Stealthed for 2 turns at the start of every other one of its turns." It works like Ethereal, only it follows the opposite cycle. This ability could work on a champion normally, or it could be paired with Ethereal to make a unit that transitions between two different states. It can opt to break its hiding place to attack. It's a bit messy to have both this and Insubstantiate around, but I think it's a cool ability anyway.
It would need to cost more than ethereal though, as this is a straight advantage whereas ethereal can be sorta bad half the time.
maybe not only cost more but have certain disadvantages like maybe , while this champion is stealthed it is pacified? something along those lines
