Items - Heroes Professor Ribbit Professor RibbitHires the legendary Hero, Professor Ribbit. Max amount 49999 Sell 200 Inside the subject Slot №1 ItemsQuantityChances 1??? Claim Where to get Quantity Chances / Cost Prime Hero Card III - Hires 1 random Legendary Hero. 1 Professor Ribbit Bag I - Grants a Professor Ribbit Card or her Soulstones. 1 Professor Ribbit Bag II - Grants a Professor Ribbit Card or her Soulstones. 1