Eternal Card Game

Unspeakable Torment is a Legendary card from the Dark Frontier set. It can be crafted for 3200 shiftstone.

You'll want to build a deck with at least one copy of Unspeakable Torment and numerous ways to gain life. PLay against the first gauntlet opponent and try to stall the game and gain enough life so that you have at least 38. Then play Unspeakable Torment so the next turn it deals 13 damage to you, then a minimum of 25 to the opponent and the achievement will unlock.