Planar Cleansing isnt as efficient as something like Kayas Wrath, but it is more of a catch all
Heroic Intervention While maybe not as interesting as the cat creating enchantments, Heroic Intervention is a must-have in any cat typal deck for its ability to deal with the biggest threat to cat kind: removal
Though Gishath isn't the most competitive card in the world, he is the most popular Dinosaur Commander by far
in the only format it was legal in, what used to be called Type I, it was restricted to one copy, and fewer and fewer people played it as the cards got more expensive and harder to find
lucasenra on Ral Zarek 7 years ago (saw your post on tumblr and had to come and suggest stuff, but feel free to ignore, I'm just trying to throw some ideas out to help out!) I think counterspells aren't very good as signature spells (but I don't have much experience with Oathbreaker)