I received an ask on my Tumblr the other day about old igwulf, so I whipped up this picture to give an idea what they look like.

Igwulf don't decay with age, they just keep getting bigger. At first, this may prove to be an advantage for some, making them steadily more powerful. Eventually, though, they get too large, heavy, and cumbersome to dart through the treetop like igwulf traditionally need to. Few live past 200 because they will eventually become too large and slow to hunt properly.

The ones that do find a way to survive can eventually become massive, dragon-like beasts, barely mobile at all, but beyond powerful if anything gets in their reach.