On casting bite of the king, the caster gained a special pocket dimension inside their stomach and the ability to extend their mouth unnaturally wide and swallow a creature inside this pocket dimension.
A creature who was swallowed by the beneficiary of the spell was crushed by the small pocket dimension and burned by acid. One way for the victim to save themself was to cut their way out with a slashing or piercing weapon. The pocket dimension could only withstand a certain amount of such damage before breaking down and on successfully breaking it, the victim appeared next to the caster.
Bite of the king required only verbal components.