The Descent: Journeys in the Dark (Second Edition) Wiki
Solitary Prey
3 Threat to Purchase
Exhaust this card when a monster performs an attack that targets a hero who is not adjacent to any other hero, before dice are rolled. This attack gains +2 Heart.
Additionally, if the monster has the Wilderness monster trait, this attack gains Pierce 1.
Tangled Web 1 Threat

Solitary Prey is a Plot Card that costs 3 Threat Tokens to purchase and 1 Threat Token to exhaust it. It boosts the attack of a monster who is attacking a lone hero, as well as adds Pierce 1 to the attack if the monster has the Wilderness trait.