Effect of type 'p_magical_defence' has three parameters:
1. Types of armor required (all = heavy, light, robe)
2. Modifier value
3. Modifier type (per = skillMDefendPer, diff = skillMDefendDiff). In this case, 'per' will multiply the base MDefend value by 1 + (modifier value / 100), while 'diff' would add the modifier value after all calculations have been performed.
You must always know the parameters an effect type expects, otherwise L2Server will simply fail to load skilldata once it encounters the first invalid entry, which in your case should be tatto_hp (at least on a clean GF server).
