Each one is beneficial in its own way and either requires certain conditions to be met or gives you instructions on what you can do when the card is played
To clarify this just in case, that doesnt include any buffs like counters, just the creatures original stat for power unless changed by something that redefines that power above 1, like Harmonious Archon or the creature has a variable power, like equal to the number of lands on the field
We have and will continue to print legendary lands from time to time when the card design makes sense, but it will be the exception rather than the rule
Metalworker Metalworker can generate lots of mana in an artifact deck, which you can then use to cast some of the artifacts that you reveal from your hand
Special Illustration Rare versions, with lower pull rates and detailed artwork, are particularly desirable
One of the first rules of Magic was that each player has a maximum hand size of seven cards, and so if a player had more than seven cards by the end of their turn, they would have to discard cards from their hand until they had exactly seven cards at the end of their turn during the cleanup phase