Originally Posted by
kirbysdl
I guess I kinda don't. Bob helps you next turn, Bauble helps you next turn, Needle Drop not only damages them now but replaces itself now. When you draw a Needle Drop, you aren't really drawing a Needle Drop. You're getting a mini Leyline of Lightning and drawing another card, which is in turn less likely to be a Mountain because your deck can run more threats, better threats, and fewer land. This is something neither Bauble nor Wraith can do, at the expense of...
The only time I'd hate to top-deck a Needle Drop is if I don't have the mana to play both it and the spell I would have otherwise drawn at the same time (e.g. I have two Mountains, draw Needle Drop, and that fetches me a Flame Rift). Whether that happens a lot will require testing, but that's what I'll be doing this weekend.