This champion was one that was changed after the release of Chaos, because her power negated the powers of the listed champions for just this player, not all, and thus this player could lock the game, but safely play his cards.

Murtha is one of a few champions immune to thief skills (most obviously, Con Game (82/DU)), and thus is valuable for just that immunity. However, when she is in the pool (where she should stay, since she's nearly powerless in combat), three nasty champions are completely neutered: Necba the Wrathmaker (14/DU-chase), the Poor Oriental Lord (20/DU-chase), and the Wealthy Oriental Vassal (81/MI). All players may play cards regardless of edition, and don't have to attack or lose a champion while Murtha is in play. Any deck built around these champions (and there are many in tournament level games) will try to kill this champion quickly, so good protection cards like the Orb of Power (170/4th) or The Winner's Cape (520/4th) are essential if you want to be safe from these cards.

Murtha's power is very similar to that of Playing Fair (64/CH), except it also stops Necba. This cards do not work for you well when you try to use these cards either, so don't build a deck using Murtha and one of the cards she stops. This card will be in many tournament decks, and needs to be planned for for any deck that plans to use Necba, POL, or WOV.