Morellonomicon should not be core.

Morellonomicon being the go-to sustain item is having an unintended side effect of making sustain heavy champions much weaker than they appear. Champions like Aatrox, Swain, Vlad, and Warwick lose a large chunk of their power but not because the enemy bought a niche counter item, Morellonomicon is currently core on almost every mana using mage. Either the grievous wounds passive needs to be removed and given to another item or Morellonomicon needs to be nerfed to not be a must buy item. Its passive is just too overbearing against some champions to be a strong purchase in every game.