Into the Abyss
The Drowned Ruins#106 (x3)
When Revealed: Each player chooses a card type and discards each card in his hand that is not of the chosen type. If no cards are discarded by this effect, Into the Abyss gains surge.

Shadow: If the active location is Underwater , search the encounter deck and discard pile for a Creature enemy, and add it to the staging area.