Cheapest priced copy (Modern Horizons 2): $0.49 at Card Kingdom, near mint, their price list as of .
Lonis, Cryptozoologist 
Legendary Creature — Snake Elf Scout · 1/2 · Rare · Murders at Karlov Manor Commander · #215
Whenever another nontoken creature you control enters, 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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 2 | 204 | Rare | $0.49 | $0.79 |
| Modern Horizons 2 | 370 | Rare | $0.49 | $2.49 |
| Murders at Karlov Manor Commander | 215 | Rare | $0.49 | — |
| The List | MH2-204 | Rare | $0.49 | — |
| Modern Horizons 2 Promos | 204s | Rare | — | $2.49 |
3 rulings from Wizards of the Coast
- 18 June 2021You can't sacrifice a Clue to activate its own ability and also to activate the ability of Lonis, Cryptozoologist.
- 18 June 2021The token is named Clue Token and has the artifact subtype Clue. Clue isn't a creature type.
- 18 June 2021The tokens are normal artifacts. For example, one can be sacrificed to activate the ability of Breya's Apprentice and one can be the target of Break Ties.