Forum:Neo galaxy-eyes photon dragon vs summoning effects

I finally got my hands on Neo Galaxy-Eyes photon Dragon and I wanted to just ask a few card rulings on him to understand his first effect better.

Neo Galaxy's effect states that when he's summoned using Galaxy-Eyes he negates all face up effects. So I've got two scenarios for this situation:

First one being does he negate effects that activate when he's summoned like if my oppenent chained a trap like bottomless trap hole or torrential tribute would he negate it or would Neo Galaxy be destroyed?

Second situation being if when he was summoned and my opponent had out the xyz monster Shining Elf, could I activate Neo Galaxy's effect when he's summoned and stop Shining Elf from being able to use his effect or would my opponent be able to chain Shining Elf's effect decreasing Neo Galaxy's attack points and if so would Neo Galaxy's effect then kick off getting rid of the attack decrease?