mtg serialized cards where to find I've opened an average of one card per year since they started doing them. : r/mtg So I guess there's serialized

This ability reads, Cast 1 Summon of cost equal to or less than the number of Growth Counters placed on Rydia from your hand without paying the cost. As Rydia [15-083L] will obtain 2 Growth Counters just by entering your field, youll be able to cast a Summon with 2 CP or less right away at no cost

The next big upside is that the creature portion has a valuable sub-type

Serpentine Ambush Sometimes all it takes is a little shape-shifting to flip the game in your favor, and Serpentine Ambush does just that

I had both playable and unplayable companions but some of those playable ones did not excite and that was an issue

Its fragile at first as a 1/1 for 3 mana, but once it gets big, it becomes a payoff with its ability