New Troop - The Reptile

This ground based beast shoots poison at its foes, the blast does heavy damage at impact and continues to eat away at the structure until it is destroyed ( Doesn't work if all troops and heroes have been defeated)
DPS- Single Strike 75 Poison 25
HP- 500
Training Cost- 200 DE
Favorite Target- Any
Damage Type- Single unit
Housing space- 10
Training time- 10 min.
Speed- 18
Targets Ground and Air
It would look similar to the lizards from The amazing spider-man but with clash of clan style art.
Any thoughts, any and all feedback appreciated.