Yes, but no...

You briefly consider whether you should swim deeper or stay at your current position to get away from the raft.

Your mind pauses momentarily, then you feel a fiery dread licking slowly, deliberately, almost sensuously up your spine.

Your nipples perk up and your ear-fins flare, as your eyes role up as if of their own accord to the square shadow cast from above.

Return to me

Your entire body is shivering and you feel like there is a stone lodged in your throat. Your back arches raising your Doral fin and you curl up, but refuse to heed the tugging in your mind which urges you to rise towards the surface.

Come

The command splashes over you like freezing water. You want to retch, but you curl only further and try to concentrate on the faint shape of your tail in the dark waters depth.

Heed my call

All of your hairs are raised and you feel your stomach is churning and rebelling inside of your strange new body, but you only hunch over even further, wrap your arms around your fishy body.

Invite not my displeasure

Your muscles lock and your head aches with piercing pressure. You feel like an icy hand has wrapped around your neck. Your gills flare in response, bringing with it much needed oxygen. Your arms tighten and you begin to sink into the enveloping darkness of the lake.

...

You don't know what is down there but surely it is better than the terrifying thing above you? So you let let yourself sink. Perhaps the distance would bring you out of the Lich's range. It hadn't said anything yet, had it. Perhaps you are already out of its range...

I command thee to stop

Your muscles lock. You'd hoped too soon. However, your tensed body made you sink even farther.

...

Perhaps now you are out of its reach? You begin to relax, and your sinking slows then comes to a stop. Darkness's envelops you. The only thing you are aware of is your body and the cold water all around you, which somehow doesn't seem to bother you.

...

You uncurl. Letting your body roll naturally in the water, to orient yourself. Relief slowly creeps back into your body. Somehow you'd managed to escape even from an eldritch horror. You're gills flare and take in the sweet oxygen from the waters of the dark abyss you find yourself in.