Cheapest priced copy (Commander 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Nascent Metamorph 
Creature — Shapeshifter · 1/1 · Rare · Commander 2020 · #36
Whenever this creature attacks or blocks, target opponent reveals cards from the top of their library until they reveal a creature card. This creature becomes a copy of that card until end of turn. Then that player puts all cards revealed this way on the bottom of their library in a random order.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 36 | Rare | $0.49 | — |
6 rulings from Wizards of the Coast
- 17 April 2020If Nascent Metamorph becomes a copy of a legendary card with the same name as a legendary permanent you control, you'll put one of them into its owner's graveyard.
- 17 April 2020If the target opponent has no creature cards in their library, Nascent Metamorph doesn't become a copy of anything. The cards are returned to that library in a random order.
- 17 April 2020If Nascent Metamorph becomes a copy of an object with a set of linked abilities (for example, one ability that exiles a card and another that refers to the card "exiled with" the object), that link only lasts as long as Nascent Metamorph is copying that object. If it stops being a copy of that object and then becomes a copy again later, the link is lost.
- 17 April 2020The creature card that Nascent Metamorph becomes a copy of is put onto the bottom of the library along with any other cards.
- 17 April 2020If another permanent becomes a copy of Nascent Metamorph, it will become whatever Nascent Metamorph is copying. It remains a copy when Nascent Metamorph's effect ends.
- 17 April 2020If an effect begins to apply to Nascent Metamorph before it becomes a copy, that effect will continue to apply.