Pain And Suffering

Whenever an opponent is dealt 3 or more damage by a single source, that player discards a card.

Whenever an opponent casts a spell, Kaervek deals damage equal to that spell's mana value to any target.

Whenever an opponent discards a card, this enchantment deals 2 damage to that player.

Haste If a spell you control would deal damage to an opponent, prevent that damage. Create a 3/1 red Elemental Shaman creature token with haste for each 1 damage prevented this way. When Hostility is put into a graveyard from anywhere, shuffle it into its owner's library.