Battle Elephant (5e Creature)
From D&D Wiki
Huge beast, any alignment
Trampling Charge. If the elephant moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 15 Strength saving throw or be knocked prone. If the target is prone, the battle elephant can make one stomp attack against it as a bonus action.
Multiattack. The battle elephant makes one attack with its gore and stomp attack, or one of the prior attacks and a trunk sweep attack.
Gore. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 21 (3d8 + 7) piercing damage.
Stomp. Melee Weapon Attack: +10 to hit, reach 5 ft., one prone creature. Hit: 23 (3d10 + 7) bludgeoning damage.
Trunk Sweep. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 13 (2d6+6) bludgeoning damage. Target must succeed on a DC 10 Strength saving throw or be knocked back 10 feet and be prone. If the creature succeeds the saving throw, they are knocked back 10 feet but remain standing.
A particularly smart, mean elephant outfitted with armor and weaponry is truly a foe to be reckoned with. Charging battle elephants are a terror to behold.