There are other things to consider, like rarity, but those are the big factors you need to consider when making custom cards
Any player, including a battle's controller, can attack the battle as long as the protector of that battle is a defending player
The majority of Baby cards have low Health Points (HP) and low impact, but some of them have strangely powerful moves like the Neo Discovery Igglybuff (shown above) which can end the opponents turn with a coin flip
There is no question in my mind that Brudiclad is a great card,;but in trying to construct the outline of my working list, I had to purposely push my focus away from all the awesome cards naturally available
With the number of playable equipment cards in Phyrexia: All Will Be One you can easily pump up your Thrummingbird to get by smaller blockers
We want to make cards where knowledge matters