One of the best sabretooth stories could be about its hunting skills. Sabretooths were fierce predators. They had those long, curved canines which they used to take down large prey. There are stories of them stalking mammoths. The sabretooth would patiently wait in the tall grass near a water source where the mammoths would come to drink. Then, with a sudden burst of speed, it would lunge at the mammoth, aiming for the soft underbelly or throat with its deadly canines.
There are stories of sabretooths surviving in harsh winters. They had thick fur to keep them warm. In these stories, they would use their large paws to dig through the snow in search of small animals that were hiding. Their powerful legs allowed them to move through the deep snow with relative ease. And those long canines were still a threat even in the cold, as they could quickly dispatch any prey they found.
The age of Sabretooth in the comics can vary depending on different storylines and timelines. But typically, he's depicted as an adult with an unknown specific age.
Wolverine and Sabretooth are brothers in the comics. Their connection is a major plot point, but it's not a straightforward or harmonious one. There's a lot of history and drama between them.
There are fanfictions that delve into their origin stories together. In some, it shows how their powers developed in relation to each other. For example, a story could show how their rivalry actually influenced the way they trained and honed their mutant abilities. It could also show how they interacted with other mutants in their early days, with their relationship being a central aspect of the plot.
In many Wolverine x Sabretooth fanfics, the writers delve deep into their characters. Wolverine's moral compass and Sabretooth's more savage nature create a great contrast. Some fanfics might even explore a scenario where they have to team up against a greater threat. This can lead to some interesting character development as they try to work together despite their differences.