Trail of Evidence

Enchantment

Whenever you cast an instant or sorcery spell, investigate. (Create a Clue token. It's an artifact with " {2} , Sacrifice this token: Draw a card.")

"Every answer seems to lead to a more terrifying question." —Jace Beleren

Investigate

Commander bracket

1 +

Fits any bracket

No Game Changer, land denial, extra turns or two-card combos.

Derived from card traits, not a ruling — bracket rules turn on how a deck intends to use a card. Bracket rules

Salt Score 0.39

How much players resent seeing this card. The scale tops out around 3.1.

Not part of any combo on Commander Spellbook.

Standard Not legal

Pioneer Legal

Modern Legal

Legacy Legal

Vintage Legal

Pauper Not legal

Commander Legal

Oathbreaker Legal

Duel Commander Legal

Brawl Not legal

Standard Brawl Not legal

Historic Not legal

Timeless Not legal

Alchemy Not legal

Penny Not legal

Premodern Not legal

PreDH Not legal

Pauper EDH Not legal

Old School Not legal

Future Not legal

Gladiator Not legal

2016-04-08
Clue is an artifact type. Even though it appears on some cards with other permanent types, it's never a creature type, a land type, or anything but an artifact type.
2016-04-08
If an effect refers to a Clue, it means any Clue artifact, not just a Clue artifact token. For example, you can sacrifice Wrench to pay for Alquist Proft, Master Sleuth's activated ability.
2016-04-08
You can't sacrifice a Clue to pay multiple costs. For example, you can't sacrifice a Clue token to activate its own ability and also to activate Alquist Proft, Master Sleuth's ability.