Flailceratops for D&D 5e

Since I've been running fifth edition a fair amount, my version of the Temple of the Snail is likely to be there, located in the Heathwood of the Sorrowfell Plains.  Since it gets referenced, here's a fifth edition-compatible version of the flailceratops from Vornheim:

This time with sick Aeron Alfrey art!

Flailceratops
Huge monstrosity, unaligned
Armor Class 14 (natural armor)
Hit Points 152 (16d12+48)
Speed 30 ft.
Str 22 (+6), Dex 9 (-1), Con 17 (+3), Int 2 (-4), Wis 11 (+0), Cha 5 (-3)
Senses blindsight 60 ft., tremorsense 60 ft., passive Perception 10
Languages —
Challenge 10 (5,900 XP)
Trampling Charge.  If the flailceratops moves at least 20 feet straight toward a creature and then hits it with a flail head 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 flailceratops can make one stomp attack against it as a bonus action.

Actions
Multiattack.  The flailceratops either makes three flail head attacks against any targets of its choosing, or a stomp and a tail attack against different targets.
Flail Head.  Melee Weapon Attack: +9 to hit, reach 10 ft., one creature.  Hit: 25 (3d12+6) bludgeoning damage.
Stomp.  Melee Weapon Attack: +9 to hit, reach 10 ft., one creature.  Hit: 22 (3d10+6) bludgeoning damage.  The target must make a DC 15 Strength saving throw or be knocked prone.
Tail.  Melee Weapon Attack: +9 to hit, reach 10 ft., one creature.  Hit: 19 (3d8+6) bludgeoning damage.