How easy is it to build aggro?

I had a theory.

That you could build a solid aggro deck out of grizzly bears without much thinking. Not actual Grizzly Bears mind you, but there are a lot of creatures with abilities on a grizzly body.

18 Forest
4 Vivid Grove
4 Wonder
2 Wilt-Leaf Liege
4 Fauna Shaman
4 River Boa
4 Selesnya Guildmage
4 Kavu Titan
4 Wild Mongrel
4 Basking Rootwalla
4 Giant Growth
4 Bonesplitter

My "bears" are twenty 2 power, 2cc creatures. River Boa is the classic anti-control clock. Selesnya, Wilt-Leaf and Wonder gives the ability to break through stalls. Titan will keep you in the mid-game. Rootwallas smooth out the curve and also make Mongrel/Shaman fodder.

This will goldfish 20 damage on 6th turn consistent. Not fast (the 2cc really hurts its speed), but I'd say better than most non-tribal casual creature decks.

Now you keep the principals the same, swap some Mongrels for Tarmagoyfs, Rootwallas for Nacatls, Bonesplitters for Jittes, et cetra and you end up with...Legacy Zoo.

K.I.S.S.

Now let me tell you about Legacy Burn...