Alfven Ato

"The culprit doesn't seem to care about covering their tracks. Let's hope that's a good thing."
—Morska

Follow the Bodies

Gravestorm (When you cast this spell, copy it for each permanent put into a graveyard from the battlefield this turn.)
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

It displays every fact, every suspect, and every scrap of evidence for every case the Agency oversees.

Panoptic Projektor

{T}: The next face-down creature spell you cast this turn costs {3} less to cast.
If turning a face-down permanent face up causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Many footprints lead into the cave. None lead out.

Cavernous Maw

{T}: Add {C}.
{2}: Cavernous Maw becomes a 3/3 Elemental creature until end of turn. It's still a Cave land. Activate only if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater.

"With the Gnat Alley mugging case solved, maybe we can finally figure out who's been leaving shoes all over the Sixth Precinct."
—Agency memo

Clue

{2}, Sacrifice this artifact: Draw a card.

Panoptic Projektor // Panoptic Projektor

"For my people, every step toward the Core is a step toward our past and our future. Once blessed with such a connection, you are bound to your destiny forever."
—Huatli