Gotcha. I get what you mean now. I misread your intent in the way you wrote it. I'm not sure my dm will allow me to mix and match the different animals at each teir but I'll see.
For what it's worth, you don't have to pick the same animal across the levels per RAW.
It's Eberron, not ebberon.
It's not high magic, it's wide magic.
And it's definitely not steampunk. The only time steam gets involved is when the fire and water elementals break loose.