Would suggest 5|0 and 8|0 in upped, but would let both on 1
.
It could seems to be much, but it's not. Comparing to Shadow, it has less chance to survive (no noctural), killing it (in most case) is a huge disadvantage to opponent and Shadow is still UP :/
It'll be a 'direct damage' with a great card disadvantage, so normal tactic will be to use it fast enough to not 'feel' the bad side, like Fractalling/Time rush/mill (milling is actually not that efficient, because you have to wait a turn normally to mill.