Corrosive Dreamscape

All non-illusion creatures gain "Vanishing X,
where X is this cards converted mana cost. If
X is part of this cards mana cost, it is treated
as 0 for the purpose of this effect" as long as
Corrosive Dreamstate is on the field
All non-illusion creatures that enter the
battlefield have this effect as long as Corrosive
Dreamscape is on the battlefield