The guys from Reign of Gaming have been once more able to get some unofficial patch notes from the Public Beta Environment. Keep in mind that these Patch Notes are not official and we don't know if they are true.
The Patch Notes include a slight buff of Gragas and Nunu and the costs for Mana Potions will be decreased by 5 Gold. The notes for Warwick are not really clear and the Tooltips of Rumble have been updated.
- • Base Health increased to 523, from 493.
- • Armor increased to 19.6 (+3.6), from 18.7 (+2.7)
- • Consume Cooldown decreased to 16/14/12/10/8 Seconds, from 18/16/14/12/10 Seconds
Rumble (These are not buffs, the tooltips just clarify Danger Zone amounts now)
- • Electro Harpoon Tooltip updated: Danger Zone Bonus: Deals 30% additional damage and slowpercentage is increased to20/26/33/39/45%.
- • Scrap Shield Tooltip udpated: Danger Zone Bonus: 30% increasein shield health and Movement Speed is increased to13/19/26/32/39%.
Warwick (The notes are unclear but I imagine its +1% for every 100 AP.)
- • Hungering Strike AP Ratio increased to 75/125/175/225/275 (+1) and 8/10/12/14/16% (+1), from 75/125/175/225/275(+1) and 8/10/12/14/16% (+0)
- • Gold Cost reduced to 35, from 40.
Source: Reign of Gaming