SKILL DRAIN ONLY NEGATES THE EFFECT NOT THE ACTIVATION OF AN EFFECT NOR THE COST TO AN EFFECT
stardust dragon will work. tributing is a cost and he resolves in the grave yard. skill drain only negates the effect of FACE UP effect monsters ON FIELD. with that being said lets go to second example
skill drain is on board. you go black rose and chain book of moon.
your board just got blown up.
the summon was successful you chain book of moon to the summon. skill drain does not intercept chains so will only negate after everything has resolved but because black rose is not face up skill drain cant find it and black rose will say "eat a dick bitch"
a good thing to remember again is that skill drain still allows you to activate the effect
so example is Hyperion, activate effect to remove krystia, no blow up happens. activate miraculous descent congrats you just played around skill drain.
WHY IS THIS RELEVANT?
ill tell you why,
dark worlds : they almost all only activate in the grave yard, unaffected by skill drain
terrible nooblet players trying to play skill drain now that barabros is reprinted and normal monsters are making a come back
aaaaand knowledge is power. make your own skill drain deck that plays around skill drain and does rely on it. so that the only one won who suffers is your opponent and if skill drain isnt on board it doesnt mess you up like all the other skill drain decks out there playing goblin attack force ect.