[OP07-056] - Slave Arrow (500 Years in the Future)

Imagine I have 1 DON!! attached to this Leader, and one of my {Impel Down} type Character cards is returned to my hand due to the effect of "OP07-056 Slave Arrow" or another effect. Can I use this Leader's effect to play 1 [Prisoner of Impel Down] from my hand?

Yes, you can. You can activate this card's effect even if an {Impel Down} type Character was removed from the field due to your own effect.