Cheapest priced copy (Ravnica Allegiance): $0.49 at Card Kingdom, near mint, their price list as of .
Ethereal Absolution 
Enchantment · Rare · Ravnica Allegiance · #170
Creatures you control get +1/+1.
Creatures your opponents control get -1/-1.
{2}{W}{B}: Exile target card from an opponent's graveyard. If it was a creature card, you create a 1/1 white and black Spirit creature token with flying.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica Allegiance Promos | 170s | Rare | — | $2.79 |
| Ravnica Allegiance | 170 | Rare | $0.49 | $0.99 |