Frog of fabulous growth

Wondrous item, uncommon

This frog has an odd quick, it has a slimy dime sized button on it’s forehead that causes the frog to increase its size one category every time its pushed to a max of large.The frog is completely unaligned and will attack whomever whenever convenient.

Tiny-->Small-->Medium-->Large.

Tiny statistics Frog from monster Manual

Small statistics- Use stats for Giant Rat but remove pack tactics and keen smell and add Swamp Camouflage. The frog has advantage on Dexterity checks made while in a swamp.

Medium statistics- Use Giant Frog from Monster Manual.

Large statistics- Use the Giant Toad from the Monster Manual.