If you had one, then all your creatures are getting +6/+6
Then the instants that sacrifice a dork to draw two cards are next, like the first one in Village Rites or many others
I liked adding in a Gorgon theme, so in went Visara the Dreadful (who is a powerful card on her own for Commander) as well as Xathrid Gorgon and even Infernal Medusa
I try to put GX Hyper Rares, Secret Rares and FAs first, then Normal GX & cards and Prism Star cards, then XY & BW series Secret Rares, FAs and normal EX cards, then Prime & Legends cards and then LV.X cards and secret rares from DP & Platinum era
Additionally, it can conceal itself in shadows, copying other Pokemon and learning the feelings of humans
Brood Keeper The nanny of dragons