This is a more user friendly version of my Booster Pack Generator which I used to test my own games
You may find that decks composed of cards from the same set may work better together, but the important thing is that if each player has two packs, they can just open, shuffle and play
to wheel, and if you control three or more artifacts, each opponent takes damage equal to the number of cards they drew
Id like this rogue more if it could get more counters on its own, though it stands as a reasonable threat for 4 mana
Relentless Challenger is going to be a key part of your strategy, as you're always going to be meeting the requirements to buff up your attacks
If some of the targets are illegal as the triggered ability tries to resolve, the original division of damage still applies, but the damage that would have been dealt to the illegal targets isn't dealt at all