For size, theyre spot on when compared to regular playing cards (also called poker size playing cards) at 2.5x3.5
They either let you drop anything in your hand, and if you are in Green you should have plenty of mana available, or they will allow you to draw more creatures from your deck
For 1 extra white mana, whatever wacky combo you set up is totally protected from instant-speed interaction just make sure you havent left any valuable pieces on the board to be Murdered before your Silence resolves
We catalog and assess them
What if you just choose to 5-0 split
Once you have cleared the task that require you to use Fighting-type and diamond rarity cards, you can switch to using Darkness-type decks, custom or rental, to complete the rest of the tasks