Armor Class 12 (natural armor)
Hit Points 105 (10d12 + 40)
Speed 40 ft.
Senses passive Perception 10
Languages understands Giant and Sylvan but can't speak
Challenge 3
Beast of Burden. The ox is considered to be one size larger for the purpose of determining its carrying capacity.
Gore. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) piercing damage. If the ox moved at least 20 feet straight toward the target immediately before the hit, the target takes an extra 7 (2d6) piercing damage, and it must succeed on a DC 16 Strength saving throw or have the prone condition.
Bigby Presents: Glory of the Giants, p. 152