[Potironette]

I dunno how to summarize this exactly, but I used this guide: http://www1.flightrising.com/forums/gde/1040710 to train dragons.

It's "The actual guide" section walks you through basically the whole ordeal...I don't really remember it.

Battlestone summary: Scratch (I think), Eliminate (Need lots of treasure..), ambush (need less treasure but lots too), berserker (at level 17), elemental might fragments (before level 17)...As for what these stones are, I think DK's Coli guide explains them xD!