Cheapest priced copy (Core Set 2019): $0.49 at Card Kingdom, near mint, their price list as of .
Sigiled Sword of Valeron 
Artifact — Equipment · Rare · Core Set 2019 · #244
Equipped creature gets +2/+0, has vigilance, and is a Knight in addition to its other types.
Whenever equipped creature attacks, create a 2/2 white Knight creature token with vigilance that's attacking.
Equip {3}
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $1.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2019 | 244 | Rare | $0.49 | $0.99 |
| March of the Machine Commander | 377 | Rare | $0.49 | — |
| Core Set 2019 Promos | 244s | Rare | — | $1.79 |
2 rulings from Wizards of the Coast
- 13 July 2018Although the token is attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example).
- 13 July 2018You choose which player or planeswalker the token is attacking. It doesn't have to be attacking the same player or planeswalker that the equipped creature is attacking.