Forum:Obelisk and fires of the doomsday

About the summoning condition of obelisk, my friend say that fires of the doomsday can summon obelisk but I was wondering aren't that card only usable for dark attribute monster? He reply that obelisk is a effect summon condition, it only nid th tribute three monster, it is an effect summon not a normal tribute summon, I was just wondering is obelisk summoning condition are an effect summon or a normal summon