Cheapest priced copy (Innistrad Remastered): $0.35 at Card Kingdom, near mint, their price list as of .
Aberrant Researcher // Perfected Form 
Creature — Human Insect // Creature — Insect Horror · 3/2 · Uncommon · Innistrad Remastered · #454
Flying
At the beginning of your upkeep, mill a card. If an instant or sorcery card was milled this way, transform this creature. (To mill a card, put the top card of your library into your graveyard.)
Flying
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad Remastered | 52 | Uncommon | — | $0.49 |
| Innistrad Remastered | 454 | Uncommon | $0.35 | $0.49 |
| Shadows over Innistrad | 49 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 8 April 2016No player may take any action between the two steps of Aberrant Researcher's triggered ability. If the card put into your graveyard is an instant or sorcery card, Aberrant Researcher will have transformed before a player can take any action.
- 8 April 2016If a replacement effect causes the top card of your library to go to a zone other than your graveyard, Aberrant Researcher will still transform if that card was an instant or sorcery card.