Dire Wildebeest 2014
CR 7 beast
Large beast, unaligned
STR19 (+4)
DEX16 (+3)
CON14 (+2)
INT2 (-4)
WIS10 (+0)
CHA5 (-3)
Trampling Charge.
If it moves 20'+ straight to a creature and then hits it with Gore on same turn target: DC 15 Str save or be knocked prone. If target is prone wildebeest can make one Hooves attack vs. it as a bonus action.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details