Night Sword

As long as Night Sword is not attached to a
creature, you may play with the top card of your
library revealed.
Whenever equiped creature blocks or is blocked
by one or more creatures, these creatures lose all
abilities until end of turn, their controller reveals
one card from their hand.
You may play cards revealed by Night Sword by
paying life equal to their converted mana cost
rather than paying their mana cost.
{2} : Attach or unattach Night Sword.