Forum:2 effects go in a chain or seperately..?

this happened earlier tonight at my local randalls.. I TRIBUTE summon zaborg the thunder monarch by way of sangan. my opponent has his stardust a.m. that he wants to negate the effect of my zaborg. however, he also knows that i will likely search for a d.d. crow via sangan which he doesnt want either.

so, does sangans activation for a chain with my zaborgs effect or do they activate & resolve independently? and, do you select the monster you wish to fetch from the deck for sangans effect at its activation or resolution? i thought it was at sangans resolvage, but wanted the true scoop from herE.

À Nazias Kram Ā