The symbol itself shows which set the card belongs to, and its color indicates its rarity
It can give itself lifelink so you can get some quick and easy life, it can give another powerful creature lifelink for even more quick and easy life, or it can give a blocked creature deathtouch so it's guaranteed to take a creature down
But Im a writer, not a mathematician, and will let someone more experienced explain that particular formula
Double-Sided Playmats featuring popular Magic: The GatheringFINAL FANTASYartwork printed on both sides of the playmat
Once Amalia reaches 20 power this way, you can destroy all other Creatures and attack for lethal
Thats right: you dont even have to spend mana to cast this as long as you control a commander, and it doesnt even have to be your own