Renshu, Below Absolute Zero

Ninjutsu {x}{u}{b}
Renshu enters the battlefield with X ice
counters, where X is 10 minus the amount of
mana spent to cast it. Other creatures get -Y/-Y,
where Y is the number of ice counters on Renshu.
Treat each creature's power and toughness value
as positive if that value is negative, and treat each creature's power and toughness value as negative
if that value is positive.