Ok, here's me attempt
"Grandma Got Run Over by a Revenant"
(parody of "Grandma Got Run Over by a Reindeer")
Grandma got run over by a Revenant
Sailin’ home from Kingshead Christmas Eve.
You can say there's no such thing as Undead,
But as for me an' Grandpa, we believe.
Grandma'd been drinkin’ too much rum grog,
And we all begged her not to leave,
But she hauled anchor anyway,
And staggered off the deck into the sea.
When we found Grandma Christmas mornin',
Floatin' near the island of Outcast,
There was plenty of dead undead around her
And a great big loot chest in her grasp.
Now, we're all so proud of Grandpa,
He's been takin' this so very well,
He's been seen around with Tia Dalma,
Drinkin' rum and generally raising He- heck.
But it's not really Christmas without Grandma,
All the family is dressed in black,
And we just cannot help but kinda wonder
If our undead grandma will attack?