Here's an actual carcha tip: trap it, bring it corpses of the dinos YOU killed, it'll sniff them and eat them. A trust meter will appear above it. Once full - break the trap, ride it and kill things. Big and strong ones, preferably. That'll fill up the actual taming meter, once THAT'S full - enjoy you giant now-tamed murderlizard (also, have a sino or a parachute with you. When I tested in singlepayer, upon finishing the tame I was thrown quite high up off the carcha's back)

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