Forum:Ojama Country help

hello im a bit confused about a card i own in my deck "Ojama Country"

because it says on the card i can use it once per turn

so i can use it on my opponants turns?

it also has a cost to use its effect though.

so can you tell me wheather i can use it on my opponants turns aswell of my own

and a minor thing can your opponant attack with ojama tokens from "Ojama Trio"