The forgotten warforged

I play in MCPE, so would greatly appreciate it coming to it first, but I have an idea for that there be a location in the Nether where there's a giant war machine thing, and a portal in the trial chambers to that structure. The war machine can be activated by giving it the heavy core. Or a different idea, have a new dimension made that the "portal" thing in the abandoned city goes to it and have the war machine on the other side of the portal and once you feed it 16 of the things that the warden drop, forgetting what it's called, the war machine awakens and once defeated have it drop one of 10 things. The blade of the fallen monster which as an idea for it's ability, when killed it gives it the echo-effect right before it dies, dealing damage to those around it, the bow of the echo-blast, which shoots a 16 block echo blast like that of the warden, and the helmet, chestplate, leggings, and boots of the fallen destroyer, full set giving 4 extra hearts and each piece limiting how close you have to be for mobs to see you except for the bosses