https://www.pcgamer.com/the-elder-scrolls-legends-isle-of-madness-exclusive-card-reveal/

The Elder Scrolls: Legends story expansion Isle of Madness will take players to the Shivering Isles, realm of the Daedric Prince Sheogorath. The journey will add a new 'Double Cards' mechanic, Dementia and Mania lane modifiers, and 55 new cards, one of which is the Wood Elf Cyriel, a 3/3 unique legendary that costs 5 Mana and has a spicy effect. The Pilfer keyword here means that each time you attack your opponent's face, Cyriel will reduce the cost of the top card in your deck by 3. 

Elder Scrolls: Legends players may recognize Cyriel's ability as one that can be gained from the Cheesemancer creature card that was available in the recent Festival of Madness event. As a standalone card, the Isle of Madness manifestation looks pretty powerful: She has okay stats in the early stages of a game, but really comes into her own when she's able to reduce the cost of a powerful but expensive card. Cyriel also pairs very nicely with Master of Thieves, which grants an extra attack to creatures with the Pilfer keyword.