The Big, Bad Wolf shows up and eats one of the opponent's creatures, although, something smaller than himself (defined by having a smaller powernote that you could Giant Growth in response to the enters-the-battlefield effect to allow the Big, Bad Wolf to eat bigger creatures)
Cards with party became better for each of those types you controlled
A deck can have any number of cards named Persistent Petitioners
Trading isnt the worst thing in the world, as sometimes youre looking to complete a dungeon and are happy to see Clattering Skeletons go
Finally, and quite notably, Rydia is very fragile, having only two toughness and no defensive keywords
Group Hug is a well-established archetype in the format, and this brings it to colors that dont normally get to enjoy it