Corroborated Alibis

Tapped creatures you control have hexproof.

Tap and exert two untapped creatures you
control: Draw a card. Until end of turn,
opponents can't investigate, scry, surveil, or
search their library. Activate only once each turn.
_________________________________________

Their stories lined up perfectly, with no discrepancies
at all. With nothing to go on, the investigation was
stopped.