atlant108
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Giving an effect from a Special Ability (or from all 4 magic tomes) as a reward for a simple artifact, enhanced with additional features, and also adding stats – this is exactly the kind of situation that goes beyond the limits of balance. In other words, it shouldn't be included in the multiplayer version.
I agree with Nargott, this is a complete imbalance, and it's not needed in single-player either! As an alternative: for collecting all the tomes of power, give some 1 useful skill or spell.