If you played it after Time Vault, you could just take infinite turns
Let us try to explain what Chains of Mephistopheles does: Anytime a player draws a card, except for the card they draw for turn, they must discard a card first
Simply because this exists I will rate cards that can fix for it a little higher and may even take some RG duals in preparation for the Wolf Run potential
While she can be utilized in numerous ways, building a Narset deck around a Voltron strategy is a viable option, allowing for massive and impactful Auras to be cast for free and placed on your already difficult-to-remove Narset
First off, there's the big one - the ultimate Lord of the Rings Battle for Pelennor Fields
Its nothing fancy, but playing this on turn one allows you to play a four-cost card on turn two - and its rare that such a speedy start to a game doesnt result in a massive advantage