Farsight Mask⁣ - Mirrodin⁣ (Uncommon)⁣ [170]

Farsight Mask allows you to draw a card whenever an opponent's source deals damage to you, provided it's untapped. This can create card advantage in control or defensive strategies, especially in matchups where you're likely to take damage consistently. However, its high mana cost and requirement to remain untapped can limit its effectiveness in faster-paced games.