Kaiser Seahorse, Double Coston, etc.

[Tiso]

If they are face-down do their effects work?

 

[D.M.E.N.]

Pretty sure they do. Since it doesn't say "when this monster is face-up, it does etc. etc." Keep in mind I'm not an expert. But I'm confident it would still work face-down.

 

[anthonyj]

Yes, you can use the effect of Kaiser Seahorse or Double Coston when they are face-down.