Under normal circumstances, you can only attach a single Energy card per turn, and we'll operate under the assumption that that's the case here, but that still means you should heal first, then attach
Once activated, it would banish every monster in the user's hand, deck, and graveyard in exchange for destroying every monster on the opponent's side of the field
without a way to deal piercing damage Scapegoat could stop Ben Kei right in its tracks
Riffle cards off your right thumb until you split the deck in half
Removing Ezuri only slows it down since you maintain the experience countersyou can kill it, but that doesnt stop it from dumping 12 counters on a Walking Ballista the following turn
In older formats or Commander, if you go through a "Sol Ring", there is a possibility of aiming for such a situation