Whenever another nontoken creature enters the battlefield under your control, 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 a random order.

Sacrifice an artifact: Add {C}{C}.

Flying

Creatures don't untap during their controllers' untap steps. Whenever a creature enters the battlefield, untap all creatures.