I've tried spawning them in the spawn might not work on Xbox by the way to tame it get a fire wyvern and spit fire at its face when it turns to ash shoot fire at the ash pile OK here's a cheat to tame instantly too click rb and lb at same time while holding those click x and y button to get the admin command bar up for Xbox then put in forcetame and before you do that tho point at the creature you wanna tame then type it in after typing it in click admin command then the creature you point at becomes yours and if you forcetame you can ride it with no saddle

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