A couple of rules questions about Vengevine magic

[Berserk]

1) If I play a creature spell and it is countered, and then I play another spell which is not countered, will Vengevine's ability trigger?

2) If I put 2 creatures into play with cards like Elvish Piper, will Vengevine's ability trigger?

[seba1983]

1) yes

2) no