Each turn as a bonus action you can choose to interact with this item in 1 of the following ways:
1) You can open the bag and state 'Rattus attacks'. Upon doing this the bag produces 1D10 giant rat(s). They are at your control for one turn, the turn after their summon.*. They then fade away.
2)You can turn the bag inside out and say 'rodent rampage'. This creates 50 giant rats. you can not control these rats. The bag is now destroyed.
*
Rats can move 10ft per turn.
They can attack and make 1 point of damage each. Provided you make a constitution saving throw, using animal handling as a modifier. If you succeed they will attack 1 creature of your choice provided the rats can see them. If you fail the rats ignore you and do rat things.
The rats have 1 hit point of health each. They can be attacked as a group. For example, 5hit points of damage would kill 5 rats
They have the abilities of regular rats.
Notes: Container