•  Null Sphere

• Base damage lowered to 80/105/130/155/180 ( +.5 AP ) from  80/110/140/170/200 ( +.7 AP )
• No longer silences target for 1/1.25/1.5/1.75/2 sec, although can still interrupt channels. Instead of silence, now grants a magic damage absorbing shield for 2 seconds.

70/75/80/85/90 Mana
9/9/9/9/9 sec Cooldown

"Kassadin fires an orb of void energy at a target enemy, dealing 80/105/130/155/180 ( .5 AP ) magic damage and interrupting channels.

The excess energy forms around himself, granting a shield that absorbs 40/70/100/130/160 ( + 2/3/4/5/6% of total mana ) magic damage for 2/2/2/2/2 seconds."

• Nether Blade ( W )

[ Heavily reworked ]

•  Passive: No longer restores mana on hit. This has been moved to the active and replaced with bonus magic damage on hit.
• Active: No longer adds extra magic damage per attack for a short duration. Instead, it now gives significant bonus damage to the next attack and restores 10% of missing mana - tripled against champions
• Cooldown lowered to 7/6/5/4/3 from 12 at all ranks. 

No Cost
7/6/5/4/3 sec Cooldown

"Passive: Kassadin's basic attacks draw energy from the void, dealing 20/20/20/20/20 ( 1/1.25/1.5/1.75/2% of total mana) bonus magic damage.

Active: Kassadin charges his Nether Blade, causing his next basic attack to deal 40/70/100/130/160 ( .5 AP ) bonus magic damage and restore 10/10/10/10/10% of his missing Mana. Mana restore triples against champions"

• Force Pulse ( E )

• Damage lowered to 80/105/130/155/180 (+.5 AP ) from 80/120/160/200/240 (+.7 AP)  

80/80/80/80/80 Mana
6/6/6/6/6 sec Cooldown

• Riftwalk ( R ) 

• Damage changed to 80/120/160 (+2/4/6% total mana ) from 80/100/120 ( +80% AP ) 
• No longer increases in damage after multiple jumps. 

• Cooldown lowered to 7/5/3 from 7/6/5 

100/100/100 Mana
7/5/3 sec Cooldown

"Kassadin teleports to a nearby location dealing 80/120/160 ( 2/4/6% of total mana ) magic damage to surrounding enemy units

Each subsequent Riftwalk within the next 8/8/8 seconds costs 100/100/100 additional Mana, stacks up to [10] times."