Its a cool one though, and youd be surprised how effective vigilance and bonus surveils are, not even factoring in the mass artifact reanimation on the activated ability
Defeat the Rocket Grunt standing guard, and use the Card Key to open the door to reach Giovanni
My personal favourite is the use of Eradicator Epidemic Virus to sacrifice the Lady (which you will be able to fetch back) to destroy all the spells in the player's hand
Synchro summoning requires making sure the cards you are sacrificing for the summon match the level rating of the desired card (to summon a level 8 Synchro monster you would need to tribute two cards whose levels equal 8, for example), and one is labelled as a tuner card
And because no damage is dealt in either direction, Boo walks away from the exchange despite having 1 willpower
You shake the snow globe to stun the creatures