FOILCheapest priced copy (Khans of Tarkir): $0.49 at Card Kingdom, near mint, their price list as of .
Avalanche Tusker 
Creature — Elephant Warrior · 6/4 · Rare · Khans of Tarkir Promos · #166s
Whenever this creature attacks, target creature defending player controls blocks it this combat if able.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Khans of Tarkir | 166 | Rare | $0.49 | $0.49 |
| Khans of Tarkir Promos | 166 | Rare | — | $0.49 |
| Khans of Tarkir Promos | 166s | Rare | — | $0.49 |
2 rulings from Wizards of the Coast
- 20 September 2014If, during the declare blockers step, the target creature is tapped or is affected by a spell or ability that says it can’t block, then it doesn’t block. If there’s a cost associated with having that creature block, its controller isn’t forced to pay that cost. If the player doesn’t, the creature doesn’t block in that case either.
- 20 September 2014If the target creature can’t block Avalanche Tusker, but could block another attacking creature, it’s free to block that creature or block no creatures at all.