The Descent: Journeys in the Dark (Second Edition) Wiki
Summon - Queen Ariad
3 Threat to Purchase
Exhaust this card after setup of an encounter to choose an open monster group. Replace that group with the Queen Ariad agent.
If the Queen Ariad agent is defeated, return this card to your Plot deck.
You cannot use this card in the "Labyrinth of Ruin" campaign.
Tangled Web 2 Threat

Summon - Queen Ariad is a Plot Card that costs 3 Threat Tokens to purchase and 2 Threat Tokens to exhaust it. It allows the Overlord to summon the Queen Ariad agent into the current encounter.