Steve, The Babysitter

Whenever another nontoken creature enters
the battlefield, investigate.
{t} Sacrifice X clues: Target opponent
reveals the top X cards of their library.
You may put a nonland permanent card
with mana value X or less from among
them onto the battlefield under your
control. That player puts the rest
on the bottom of their library in any order.
"Turns out I'm a pretty damn good babysitter."
- Steve