Agnaiseer Guardian

Force Absorption whenever the guardian takes force damage it heals that much damage instead

Rage when it is below 60hp, the constructs eyes glow red, roll a d6 at the start of each of its turns.

1: whips its tail and uses the effects of the Tidal Wave DC:15

2: uses the spell fabricate to add stone around it to add to its ac (+1) 

3: erupts in fire, that doesn't extinguish(gains immunity to fire damage until its next turn) 

4: erupts in thunder and lightning( uses the spell Thunderwave from itself and gains resistance to thunder and lightning damage until its next turn)

5:  casts Transmute Rock the players are Grappled by the soft mud under their feet turned to stone DC:15 to escape the hardened mud under the players feet.

6: casts Bones of the Earthfrom the earth below each player. DC:15

Multi-attack The guardian makes 2 slam attacks and one gulp attack

Slam Melee Weapon Attack: +5 to hit, reach 10 ft., 1 target. Hit: 10 (2d10) [Bludgeoning] damage. 

Gulp Melee Attack: +5 to hit, range 10 ft., 1 target. on a hit, the target makes a dex saving throw (DC:15)  or be swallowed. (When swallowed you are considered restrained it takes 15 damage during one round to have the guardian regurgitate them out. The guardian regurgitates all creatures at the start of it's turn. The guardian can only have 2 creatures swallowed at one time.)