This can be before blockers are declared, after blockers are declared but before combat damage is dealt, during combat after combat damage is dealt, during the postcombat main phase, during the end step, or, in some unusual cases, during the cleanup step
putting it into exile prevents it from getting discarded
Its another big creature that you can cast for 4 mana with Satoru Umezawa, though other decks like Braids, Conjurer Adept can cheat it into play to give you a big, evasive threat with shroud
still a few weeks until we get spoilers for Aetherdrift, but I bet there's a pre-pre-spoiler from months ago that went largely ignored out there
Beanstalk Giant // Fertile Footsteps Putting extra land onto the battlefield, aka ramping, is one of the most powerful things you can do in MTG, especially in commander
So with that summary in mind, lets take a more in-depth look at each type of booster pack