Cheapest priced copy (War of the Spark): $0.35 at Card Kingdom, near mint, their price list as of .
Bond of Insight 
Sorcery · Uncommon · War of the Spark · #43
Each player mills four cards. Return up to two instant and/or sorcery cards from your graveyard to your hand. Exile Bond of Insight.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| War of the Spark | 43 | Uncommon | $0.35 | $3.49 |
2 rulings from Wizards of the Coast
- 3 May 2019You can return two instant cards, two sorcery cards, one of each, just one instant or sorcery card, or none at all.
- 3 May 2019Bond of Insight doesn’t target the cards to return to your hand. You choose which cards to return as it resolves. You can choose up to two cards in your graveyard at that time, including ones just put into your graveyard by Bond of Insight.