Cheapest priced copy (Aetherdrift): $0.49 at Card Kingdom, near mint, their price list as of .
Bulwark Ox 
Creature — Ox Mount · 2/2 · Rare · Aetherdrift · #7
Whenever this creature attacks while saddled, put a +1/+1 counter on target creature.
Sacrifice this creature: Creatures you control with counters on them gain hexproof and indestructible until end of turn.
Saddle 1 (Tap any number of other creatures you control with total power 1 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
6 printings · $0.49 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aetherdrift | 7 | Rare | $0.69 | $0.79 |
| Aetherdrift | 333 | Rare | $0.49 | $0.99 |
| Aetherdrift | 428 | Rare | — | $1.99 |
| Aetherdrift | 532 | Rare | — | $3.99 |
| Aetherdrift Promos | 7p | Rare | $0.99 | $2.49 |
| Aetherdrift Promos | 7s | Rare | — | $0.69 |
6 rulings from Wizards of the Coast
- 7 February 2025You may activate a permanent’s saddle ability even if that permanent is already saddled.
- 7 February 2025“Saddled” isn’t an ability that a creature has. It’s just something true about that creature. It won’t stop being saddled until the turn ends or it leaves the battlefield.
- 7 February 2025An ability that triggers when a creature “attacks while saddled” will trigger only if that creature was saddled when it was declared as an attacker.
- 7 February 2025“Saddle N” means “Tap any number of other untapped creatures you control with total power N or greater: This permanent becomes saddled until end of turn. Activate only as a sorcery.”
- 7 February 2025Creatures with saddle can attack or block as normal even if they aren’t saddled.
- 7 February 2025If a permanent becomes a copy of a saddled Mount, the copy won’t be saddled.