the player could have the option to destroy your drone in his opponent causing strong damage against a opponent

Thats not a good idea. Lets say your drone does 50 Damage like the Strongest does. It does 50 Each turn. If you self Destructed it. Say it will do 100 Damage.
But if a battle goes for 4 turns each like most would. thats 200 Damage being dealt. Its good how it is in my oppinion.