if the only magic and trap face down are yours do you have to destroy them?
If you summon zaborg and theres no monsters on your opponents side of the field do you destroy one of your own??
if theres only one magic or trap does his effect still work? :mad:

1 - The card says "Select 2 face-down Spell or Trap Cards on the field and destroy them." So if the only existing targets for Greenkappa are yours, then you must destroy them.

2 - Zaborg's text reads "When this card is Tribute Summoned, destroy 1 monster on the field." Again, if the only existing card is yours, you must destroy it.

3 - I assume you mean Greenkappa. According to the FAQ it says "If there is only 1 face-down Spell or Trap Card on the field when the effect of "Greenkappa" is activated, the effect disappears." Or were you referring to another card?

1. No, there MUST be 2 face-down Magic/Trap cards on the field to be able to resolve Greenkappa's effect. It does NOT matter which side they are on, though, so if you are the only one with 2 set m/t cards on the field, you MUST select them for Greenkappa's effect.

Though, you CAN chain m/t assuming you can fulfill the requirements, cost and/or effect(s)

2. Yes, since Zaborg does not state specifically what side. It just destroys 1 monster on the field.

This is why if Zaborg is the ONLY monster on the field when Tribute Summoned, the only target remaining is itself.