Silver Plant. The ZXY isn't actually that durable, they're made of a self regenerating metal infused with a rare silver plant from their home planet. and heals 2 hp at the start of every turn.

Spellcasting. The ZXY is a 3-level spellcaster. Its spellcasting ability is dex 10, +6 to hit with spell attacks. The ZXY has following spells prepared:

Cantrips (at will): continual flame, inflict wounds
1st level : thunderous smite, create or destroy water

Status report. Alerts 2 more ZXY of your location which appears after 5 of the ZXY's turns  if ZXY hasn't been defeated.

Iron blow. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit:  3d8 + 2 [bludgeoning] damage.

Cowardice. It attempts to flee, (Dex serving throw of 10+ if player chooses to chase)

get punched. Takes %50 damage attack and does %100 damage to the attacker in a single punch.