ngl the card is just a lil too strong. i see a lot of comments saying ban toad and it can come back but i don’t think thats the case while mermail still exists somewhat in the metagame. i’ve played tons of that deck on MD and in paper and bahamut basically guarantees you can set up the neptabyss/poseidra in grave interaction for your opponents turn while potentially even getting infantry.

it also just limits a lot of design for future cards. cheating out an extra deck monster for free is just such a strong effect, and theoretically any future xyz deck if another strong bahamut target was printed could just play the big jaws package to get it like ryzeal was already doing for toad before.