Looted caravans

Looted caravans will be structures spawning in overworld. They are basically shipwrecks but on land. Looted caravans will generate with 2-3 horse wagons, loot chests, 3-4 zombie villagers and it would be a good opportunity to add zombie horse in survival mode; but zombie horses will not spawn with structure everytime and when they will spawn,  they will spawn only 1 per structure, making it a rare and hard to obtain mob. Zombie horse spawned with structure always will be tamed like skeleton horse. Loot chest will generate with typical 'trader' loot like food, crops and seeds, gold, emeralds, tools, compass, paper, saddle ect. They will only spawn in biomes which are navigable for horse wagons like plains, desert, sunflower plains ect. They will never spawn in bioms like mountains, oceans, dark oak forest ect.