Each one starts with a single ability, and with hard work, determination, and okay, yes, some mana, you can level them up to level 2 and level 3 in order to access additional powerful abilities
However, throughout the game's history, there have been several cards designed by Wizards of the Coast that most players don't even know exist
Organizing can get overwhelming really quickly, so just work on one small area/shelf/box at a time or start slowly acquiring some storage bins over time and eventually the hard work will pay off and you can go from this: ...to this: And one more thing- while you're at it, DUST YOUR DESK OFF
Most of the time you can resolve your spells and Prowess triggers in such a way to target your own creature and have it survive, but no need to take that chance if you dont have to