
Instant
Search your library for a card, reveal that card, and put it into your hand. You lose life equal to its converted mana cost. Then shuffle your library.
or maybe

Instant
Search your library for a card, then shuffle your library and put that card on top of it.
At the beginning of your next upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its converted mana cost.
Something like that. Not sure about the casting cost or instant/sorcery-ness, but yeah something along those lines. This would...
- ...be immediately restricted in Vintage but not overpowered next to the other tutors, and give combo a much-needed shot in the arm as well as complimenting Vamp and DT in blue decks.
- ...be immediately banned in Legacy.
- ...be quite balanced in the current Standard, and maybe enable SOME sort of combo deck there.
Thoughts?
edit: on second thought, any tutor this powerful would be degenerate in Standard of any era. Was just thinking how goddamned BORING and un-skill-intensive the current Standard is, in part due to the lack of good tutor effects (except Snapcaster, which is a kind of weak tutor).