Had a few more ideas to go along with the discard deck:
[Mindrending Shade] COV, Purity 2, Cost 3, Power/Toughness 0/2: Mindrending Shade is unblockable. When Mindrending Shade attacks a player, that player discards a card. If they cannot they lose 2 moral.
[Empathic Night-Terror] COV, Purity 3, Cost 5, Power/Toughness 2/2: Flying; Pay 2 and exhaust this creature, this creature gains +X/+X where X is 5 minus the number of cards in your opponents hand. This creature deals damage to players in the form of moral.
[Oppressive Shade] COV, Purity 2, Cost 2, Power/Toughness 0/6: Vigilance; (possibly flying) This creature costs 1 more to play for each card in your opponents hand. When a creature deals damage to Oppressive Shade, return that creature to its owners hand at end of turn.
[Wailing Halls] COV, Purity 3, Cost 5, Field: When your opponent discards a card, they must discard another card. If that player cannot discard a card, they lose 2 moral. This effect can only activate once per turn. When a player fails to discard a card, that player loses 2 additional moral.
[Twisted Possessor] COV, Purity 1, Cost 1, Power/Toughness 0/2: While this creature is in the defensive zone, whenever your opponent draws a card, they lose 1 moral.
[Fog of the Veil] COV, Purity 1, Cost 4, Spell: Creatures on the field get -X/-0 where X if 5 minus the number of cards in your opponents hand. This spell does not effect shades.
Let me know what you guys think!