Abilities that kill creatures after they damage you have proven unworthy as general strategies in the past, but on a three-mana card that would have cost three mana anyway, this is by far the cheapest such an ability has ever been
Even if you're in mono-blue, unless you're a full-on "there's only so much fun in a game of Magic, and I'm here to have all of it" person and are playing 40 CounterspellCounterspells, there's now a better option in Thunderclap DrakeThunderclap Drake
You might want to focus on removal spells (like [c]Fateful Absence[/c]), counterspells (like [c]Saw It Coming[/c]), and board clears (like [c]Doomskar[/c])
In either case, auctions are held quite often and publicly on both pages, and you'll easily be able to get the hang of that
This is a very low cost effect to add to the deck to add another dual type card for Winter
If you control two Parallel Lives, then the number of tokens created is four times the original number