The three monsters were the Unova starters (Oshawatt, Snivy, and Tepig) which featured artwork that depicted their evolutionary forms
Nyleas Colossus Nylea's Colossus needs to be in an enchantment-centric deck, but its an incredible win condition for those decks
The deck can easily fill the grave and many of their monsters have grave effects
If you can have it survive until the late game though, you can put a slow clock on your opponent with its ability and would work well if there was a creature stalemate
The first Commander deck, Blast from the Past, is a Blue/White/Green deck that will contain the first eight Doctors and their companions
However, the additional damage is only +1 and it occupies both hand slots, which makes it difficult to use it with other hand slot assets