But what are artefacts that really needed to be broken so badly? I can only think about Etherial amulet on 3+ stuff. If an artifact is on squishy hero, it is better to snipe it with meteoric convocation+arcane bolt+some shooting. If it is on a Monster, just feed it with skinks so it won't bother you. Finally, there's an artefact of the realms that negates effect of other artefacts, but it works only in 3". I never saw anyone use it in any list. The idea of shattering artefact maybe cool, but if you need to sacrifice a warlord trait for it. I see more worth in taking Vast Intellect to increase chances to cast astral tempest, because it can deal more damage than couple of summoned units and teleports.