Circle of Confinement⁣ - Innistrad: Crimson Vow⁣ (Uncommon)⁣ [7]

Circle of Confinement is an enchantment that, when you cast it, allows you to exile one of your opponent's creatures with a mana value of 3 or less until Circle of Confinement is removed from the battlefield. This can be particularly useful early in the game to deal with pesky low-cost creatures that might otherwise threaten your board state. Additionally, if your opponent plays a Vampire spell that shares a name with a creature you've exiled, you gain 2 life, which can help you stabilise if you're under pressure. However, the enchantment’s effectiveness is limited to creatures of a certain power level, and it won’t help against larger threats. If your opponent has a strategy that doesn't rely heavily on low-cost creatures or if they can remove Circle of Confinement easily, its impact may be minimal.