Forum:Costs Vs. Skill Drain

I could tribute Thunder King Rai-Oh, if I had Skill Drain out, correct, sine his 2nd effect is a cost? Same with, Koa'ki Meiru Sandman, Koa'ki Meiru Wall, etc. And would I have to reveal for the Koa'ki? --99.33.36.125 (talk) 02:59, July 13, 2011 (UTC)