User blog comment:ObsidianLazarus/Aghanim's Scepter Theorycrafting/@comment-4636093-20140116145710/@comment-4636093-20140116170050

Viktor's version of Aghanim's Scepter has a different build path, upgrading from his Hex Core instead of the usual path (whatever that may be, I'm thinking Catalyst+Blasting Wand+Pickaxe). This item grants the normal Aghanim's Stats plus the 3AP per level from the Hex Core.

Chaos Storm now pulses its silence on and off every 0.5 seconds over its duration.

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Pantheon slows enemies hit by his ult by up to 99% for 2 seconds depending on how far away from the centre they are (20% slow at the edge)

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Malzahar now summons an extra 3 fully grown voidlings which attack the enemy when he ults them.

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Mordekaizer no longer creates a ghost of the enemy champion who dies under his ult.

Instead Morde instantly recieves a free copy of all of the champion's items when he ults them. If they die while under his ult he retains them for a further 15 seconds.