Starve
If you have nothing to eat but your ego, you'll starve. You can't eat it, and your ego is keeping you from accepting actual food or help from other people.
You have to check your ego at the door, because you'll definitely starve otherwise.
が
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You starve (thanks ego) and turn into a gargoyle (が). As your stomach aches, your skin turns gray and you slowly harden into a crouched position.
Now your starved body has been moved to the top of a castle, where you scare away people and birds with your loud grumbling stomach and scary face.