Cheapest priced copy (Theros Beyond Death Promos): $0.49 at Card Kingdom, near mint, their price list as of .
Nessian Boar 
Creature — Boar · 10/6 · Rare · Theros Beyond Death · #328
All creatures able to block this creature do so.
Whenever this creature becomes blocked by a creature, that creature's controller draws a card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $1.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death Promos | 181p | Rare | $0.49 | $0.79 |
| Theros Beyond Death Promos | 181s | Rare | — | $1.79 |
| Theros Beyond Death | 181 | Rare | $0.49 | $0.49 |
| Theros Beyond Death | 328 | Rare | $0.79 | $0.79 |
4 rulings from Wizards of the Coast
- 24 January 2020Nessian Boar’s second ability triggers for each creature blocking it.
- 24 January 2020If a creature can’t block Nessian Boar for any reason (such as being tapped), then it doesn’t block. If there’s a cost associated with having it block, the player isn’t forced to pay that cost, so it doesn’t have to block in that case either. If there’s a cost associated with having it block Nessian Boar, but not to block other attacking creatures, that creature is free to block one of those other creatures or to not block at all.
- 24 January 2020If a creature is required to block two or more different creatures, its controller chooses which one that creature blocks.
- 24 January 2020Nessian Boar’s second ability resolves before combat damage is dealt, and players have priority to cast spells (such as the cards the defending player just drew) after the ability has resolved but before combat damage is dealt.