Cheapest priced copy (Guilds of Ravnica): $0.49 at Card Kingdom, near mint, their price list as of .
Ritual of Soot 
Sorcery · Rare · Guilds of Ravnica · #84
Destroy all creatures with mana value 3 or less.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 84 | Rare | $0.49 | $0.49 |
| Guilds of Ravnica Promos | 84p | Rare | $0.59 | $1.49 |
| Guilds of Ravnica Promos | 84s | Rare | — | $0.69 |
2 rulings from Wizards of the Coast
- 5 October 2018If a permanent has {X} in its mana cost, X is considered to be 0.
- 5 October 2018Tokens that aren't a copy of something else don't have a mana cost. Anything without a mana cost normally has a mana value of 0.