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
Until then, swim at your own risk
The Master's Key was given to tournament finalists, and only 36 tournament participants were awarded a certified copy
I would use this card primarily for its Ability, because of its Ability, I would build a deck that includes a fair amount of stage 1 and stage 2 Pokemon cards that require a lot of energy cards to attack, that way, I could evolve into those Pokemon, put them into the active Pokemon spot and still be able to attack with one of their previous evolutions
When the TCG originally launched in the 1990s, no one could have predicted that some Pokmon cards would be worth hundreds of thousands of dollars someday
If Woodcaller Automaton is no longer on the battlefield, use the power and toughness it had the last time it was on the battlefield