I think Commander is a great place for him, but don't be surprised if you see Kellan getting attempted in formats such as Standard (at first, anyway--Boros enchant / equip decks have been trying for a while to succeed), I actually wonder how Kellan can work in decks that like to play Open the Armory
Hexproof from planeswalkers might seem a bit tacked-on, but that doesn't mean that you wouldn't be playing a 4/3 flying lifelinker that lets you PlaguecrafterPlaguecrafter every turn anyhow
From a play standpoint, however, I can't count the number of times I saw someone play this for the first time and go "all right, X is seven and you guys are screwed now!", only to realize they only had two seven-drops in their deck total, and they still had to play both of them
Odds and Ends Vanish Lands These lands feature landscapes where the Tutles had just recently departed from
Here is an example: You cast Lightning Bolt targeting your opponent
You won't draw a card even if that creature is legendary