My variant Tarasque (work in progress, if you guys have any ideas)
Variant Tarasque
Speed: 60, Climb 60, Burrow 60, Swim 60
-Needs to be faster and what kind of underground lair dwelling world ending monster doesn’t have burrow? He needs to be able to climb up the castles like Rampage style, and swim like any good Kaiju.
Regeneration: 30 (If at 0 h.p and a wish is used to wish the tarasque to no longer regenerate, this is the only way to kill the tarrasque) If beaten down to 0 h.p and not killed the tarrasque usually burrows down into the earth to slumber for years before returning.
-Nod to old school, the tarasque should regenerate for goodness sake.
Siege Monster: this monster deals double damage to objects and structures
-Overkill I know, but it just sounds cool and earth elementals get it so why not.
Tremorsense: 120
-Well if he burrows he should have this, plus blindsight is blocked by cover so this is cool for him to have anyway
Devastation: Large or smaller creatures (and structures) the Tarasque decides to move through take (4d8) damage, they can make a DC 17 Dexterity save for half damage. A creature can only take this damage once per turn.
New attack option
Debris: the tarrasque can use it’s tail to knock earth, rock, trees, wagons, etc into the air and fill a 15’’ radius sphere up to 120’ away doing (4d6) damage Dexterity save 17 for half damage. If the tarrasque uses this attack he can not make a normal tail attack this turn. Debris can be used like any other attack as a legendary action.