Cheapest priced copy (Time Spiral Remastered): $0.99 at Card Kingdom, near mint, their price list as of .
Saffi Eriksdotter 
Legendary Creature — Human Scout · 2/2 · Rare · Time Spiral · #245
Sacrifice Saffi Eriksdotter: When target creature is put into your graveyard this turn, return that card to the battlefield.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.99 to $37.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 245 | Rare | $1.49 | $37.99 |
| Time Spiral Remastered | 260 | Rare | $0.99 | $3.49 |
2 rulings from Wizards of the Coast
- 19 March 2021Saffi's effect works only once. If the target creature dies and is then returned to the battlefield, it's considered to be a new creature. If that new creature dies, it won't come back.
- 19 March 2021Saffi can be the target of its own ability. In this case, the ability won't resolve because its target is illegal, so Saffi won't be returned to the battlefield, but any abilities that check when or if a creature dies will see that it died.