Anti-Burst item & Keystone
New item:
+100 AP +250 Mana +45 Armor Gives a shield similar to Pantheon that blocks the first basic attack received while in combat with enemy champions. Kind of the defensive version of Stormrazor. Build path: seeker's armguard, blasting wand, sapphire crystal.
That should provide an option for mages that need mana and ap but also armguard to survive. Also stops forcing zhonyas to be built if you just want the ap/armor from seekers. Given how insane burst is right now, how most of the problematic burst has some sort of auto attack involved and how mages need to build mana early more than ever, this item makes sense to add to the rift.
New Keystone:
I don't have any good ideas for this but we need a keystone that keeps YOU alive. All keystones always either do damage or provide some sort of utility or both. There's no straight forward keystone that just prevents the person who took it from dying a little less fast.
Maybe:
You passively have a shield that grants 30% damage reduction, and every time you get hit by an attack or ability(including toggle ticks but not dots) that reduction is reduced by 5%. Then goes on cooldown and then resets out of combat.
