MScore: 7.5/10
Bulwark Ox
Creature — Ox Mountrare
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.)
2/2
Illustrated by Brent Hollowell · Aetherdrift Promos · #7p
Rulings for Bulwark Ox
6
2025-02-07
“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.”
2025-02-07
“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.
2025-02-07
Creatures with saddle can attack or block as normal even if they aren’t saddled.
2025-02-07
If a permanent becomes a copy of a saddled Mount, the copy won’t be saddled.
2025-02-07
You may activate a permanent’s saddle ability even if that permanent is already saddled.
2025-02-07
An ability that triggers when a creature “attacks while saddled” will trigger only if that creature was saddled when it was declared as an attacker.
in its mana cost unless its controller pays 
.