What was once built out of wood comes Crashing Down fast
A wall of wood you should have known would never last
Build it bigger build it better then before
But don't forget to place a door
Stone by Stone Brick by Brick
A task like this doesn't happen quick
For whatever it is and for whatever I've been shown
Be careful because if you remove a brick or stone
Everything weakens and starts to crumble
And that makes for grabbing for bricks one giant fumble
Again stone walls come crumbling and cracking
Revealing every flaw and everything you're lacking
So build the wall stronger and ever so much thicker
This time out of steel they will go up much quicker
Build them up until they block the light
Bunker down defend and prepare to fight
Walls out of steel can remain Unbroken
They will always help keep things unspoken
Lock the gate hide the key
So now maybe there's two beasts inside of me
You show us the equivalent of a "plot twist" in poetic terms toward the end and I thoroughly enjoyed this, but I can't help but notice the capitalized words throughout the stanza and this unsettles me. I see why you would highlight these words, but the message is clear and I find it unnecessary.
This reminds me of a conversation I had with a friend not too long ago; talking about walls and how good spirits may meet you there - For it exists, but I don't see why you would want to lock monsters within four of them. Why not build spaces for due circulation of the good and the bad? Perhaps you did not mean mal entities, but whichever be confined within you.
Thank you for sharing, but I deem it not to be your best.