These aren't the only valuable cards you'll want to crack open, however
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Notes and Rules Information for Cloud, Midgar Mercenary: Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities are triggered abilities and will have "when," "whenever," or "at" in their reminder text
So, if you have a 2/2 with deathtouch who attacks and gets blocked by a 4/5, both creatures die
You dont have to gift someone an 8/8, but if you do, it means at its floor its making you an 8/8 that end step
Lifelink (Damage dealt by this creature also causes you to gain that much life.) This creature can't be the target of black or red spells your opponents control
Then you can tap one with a mana to pump an Assembly Worker that is attacking by +2/+2