Cheapest priced copy (Theros Beyond Death Promos): $0.99 at Card Kingdom, near mint, their price list as of .
Elspeth, Sun's Nemesis 
Legendary Planeswalker — Elspeth · Mythic · Theros Beyond Death · #255
−1: Up to two target creatures you control each get +2/+1 until end of turn.
−2: Create two 1/1 white Human Soldier creature tokens.
−3: You gain 5 life.
Escape—{4}{W}{W}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death Promos | 14p | Mythic | $0.99 | $2.99 |
| Theros Beyond Death Promos | 14s | Mythic | — | $2.99 |
| Planeswalker Championship Promos | 2020-6 | Mythic | — | — |
| Theros Beyond Death | 14 | Mythic | $0.99 | $0.99 |
| Theros Beyond Death | 255 | Mythic | $0.99 | $1.49 |
8 rulings from Wizards of the Coast
- 24 January 2020After an escaped spell resolves, it returns to its owner's graveyard if it's not a permanent spell. If it is a permanent spell, it enters the battlefield and will return to its owner's graveyard if it dies later. Perhaps it will escape again—good underworld security is so hard to come by these days.
- 24 January 2020If you activate a loyalty ability of Elspeth, she's put into your graveyard, and she escapes all in the same turn, she'll be a new permanent. You can activate one of her loyalty abilities even though she's represented by the same card.
- 24 January 2020If you cast a spell with its escape permission, you can't choose to apply any other alternative costs or to cast it without paying its mana cost. If it has any additional costs, you must pay those.
- 24 January 2020Once you begin casting a spell with escape, it immediately moves to the stack. Players can't take any other actions until you're done casting the spell.
- 24 January 2020Escape's permission doesn't change when you may cast the spell from your graveyard.
- 24 January 2020If a card has multiple abilities giving you permission to cast it, such as two escape abilities or an escape ability and a flashback ability, you choose which one to apply. The others have no effect.
- 24 January 2020If a card with escape is put into your graveyard during your turn, you'll be able to cast it right away if it's legal to do so, before an opponent can take any actions.
- 24 January 2020To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an escape cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was and no matter whether an alternative cost was paid.