3 change really insteresting from the pbe .

Presence of Mind (P2) Effect changed to: "Takedowns restore 20% of your maximum mana and refund 10% of your Ultimate's cooldown."

Manaflow Band (S2) Effect changed to: "Hitting an enemy champion with an ability permanently increases your maximum mana by 25, up to 250 mana. After reaching 250 bonus mana, restore 1% of your missing mana every 5 seconds Cooldown: 15 seconds"

Gragas [Context] Explosive Cask (Q) AP ratio increased from 60% to 70% Drunken Rage (W) AP Ratio increased from 30% to 50% [New Effect] damage reduction is now increased by an additional 8% for every 100 AP.