Crystal-taken-over sand golem (for low level))

Immutable Form. The golem is immune to any spell or effect that would alter its form.

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

**** You (maybe):  The Golem can summon more of his buddies to Stack together like Voltron and basically just me more +powerful. +5 to hit dice and +50 Health. If the creature is fed before this encounter (or befriended) It will shrink to a 2-3 foot tall form and  generally just be cute. Will help the party (or the one who befriended/fed it).

Multiattack. The golem makes two slam attacks.

Slam. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 15 (4d4 + 2) bludgeoning damage.

Slow (Recharge 5–6). The golem targets one or more creatures it can see within 10 feet of it. Each target must make a DC 15 Wisdom saving throw against this magic. On a failed save, a target can't use reactions, its speed is halved, and it can't make more than one attack on its turn. In addition, the target can take either an action or a bonus action on its turn, not both. These effects last for 1 minute. A target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.