Elpth, Nightmare Scourge

{b}{r}{u}: Put a nightmare counter on target creature.
Creatures with nightmare counters on them can't attack or block and its activated abilities can't be activated for as long as Elpth, Nightmare Scourge is on the battlefield.
{b}{r}{u}{3}: Elpth, Nightmare Scourge becomes an enchantment with: Enchant player, that player cant play noncreature spells.
{u}{r}{b}: Elpth, Nightmare Scourge becomes a creature.