Known to an Ounce
The Hobbit: On the Doorstep #49 (x2)
Perfidia

When Revealed: Each player discards 2 random cards from hand. Until the end of the phase, each Dragon enemy in play gets +1 Threat for each event discarded by this effect.

Burgle: The first player shuffles his deck and reveals the top card. He may discard 1 card from his hand that matches the revealed card's sphere and cost.