"Any number" seems rather ridiculous. In theory, I could use this to tutor (and draw), I dunno, 18 enchantments from my deck for a mere 2 mana to, say, feed through Mongrel. And that's just the first thing that comes to mind - there's bound to be stuff that's actually scary.
Why not something like:
Tragic Ambitions 1(B/W)
Enchantment
At the beginning of your upkeep, you may search your library for an enchantment card and put it in your hand.
At the end of turn, you may pay 2 life for each enchantment you control. If you don't, sacrifice all enchantments you control except for Tragic Ambitions.
That's still a free draw per turn!