Even if it was the old beater anvil, torching into it was an ahole thing to do.
Let's see it overall from other angles.
If it was is super nice shape, $5 a pound so five hundred dollars.
If time is free or it's fun for you maybe.
I'd start by grinding the face to clean bright shiny metal, everything.
Maybe blasting it, dremeling with burr.
That's a HUGE lot of time, but weld does not stick to dirt or rust.
Preheat in a gas bbq
You could build up with 7018 or equivalent mig wire.
hard facing is the expensive part
It's simplest to weld on hard facing rod, but that stuff is stupid expensive.
Maybe a couple of hundred for hard rod.
If you can get some cheap surplus for beer money maybe.
I've seen a hardenable plate forge welded on, but that was done on a huge dirt pit forge, with a crane to pull it out of the fire, set the weld.
and then repeated all over again to harden the plate.
Stick welding is definitely simpler.
I've talked myself into it.
I suppose I would do it.
It's more fun than watching TV