Cheapest priced copy (Ravnica Allegiance): $1.49 at Card Kingdom, near mint, their price list as of .
Tome of the Guildpact 
Artifact — Book · Rare · Ravnica Allegiance · #242
Whenever you cast a multicolored spell, draw a card.
{T}: Add one mana of any color.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $1.49 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica Allegiance | 242 | Rare | $1.49 | $3.99 |
One ruling from Wizards of the Coast
- 25 January 2019Tome of the Guildpact’s ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.