'Subversive word is is a cleric attack power introduced in Unearthed Arcana: Ignorance is Blessed. It is meant as a substitute for healing word. As an Unearthed Arcana resource, it might not necessarily be canon, and may need to be approved by the DM first. [Dr398:UA] Assuming an average constitution score of 10, the power does 6 damage to start increasing by 2.5 per level (plus the extra die rolls at level 11 and 21). As mostly a fixed-damage attack, it may be useful as a sudden boost from a minor action, but is costly due to requiring a healing surge.