No, it is an Ignition Effect and can only be used in your turn.
there is no such card with an effect like that. you could be referring to parasitic parasite, which is special summoned to their side of the field when they draw it and they take 1000 damage.
Once every turn
ya
geminis must be summoned a second time to get the effect while effect monsters only need one summon
Yes.
No. It is an Ignition Effect, meaning you may only activate Snipe Hunter's effect during your turn.
Nova summoner for lights
defeat all level 1 opponents 5 times each
there is no such card with an effect like that. you could be referring to parasitic parasite, which is special summoned to their side of the field when they draw it and they take 1000 damage.
No, there is nothing that can do that.
deafeat 3 opponents 5 times in world champion
vomiting ogerett
yes
You have to defeat three opponents 5 times each in Free Duel (World Championship mode).
Once every turn
ya
geminis must be summoned a second time to get the effect while effect monsters only need one summon