Cheapest priced copy (Edge of Eternities): $0.99 at Card Kingdom, near mint, their price list as of .
Weftwalking 
Enchantment · Mythic · Edge of Eternities Promos · #86p
When this enchantment enters, if you cast it, shuffle your hand and graveyard into your library, then draw seven cards.
The first spell each player casts during each of their turns may be cast without paying its mana cost.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.99 to $1.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 86 | Mythic | $0.99 | $0.99 |
| Edge of Eternities | 330 | Mythic | $1.29 | $1.49 |
| Edge of Eternities Promos | 86p | Mythic | $0.99 | $0.99 |
| Edge of Eternities Promos | 86s | Mythic | — | $1.79 |
One ruling from Wizards of the Coast
- 25 July 2025If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the spell has any mandatory additional costs, such as that of Embrace Oblivion, those must be paid to cast the spell.