MTG might be one the best card games around, but we're also rounding up all the best tabletop RPGs and the best board games overall as well
If you still want a theme beyond legendary cards are strong, Jodah Superfriends seems like an interesting angle that would get in a bunch of proliferate cards alongside powerful planeswalkers like Teferi, Hero of Dominaria, Nicol Bolas, God-Pharaoh, and Oko, Thief of Crowns
You can see this further down the 'essential info' section
Also, you will be able to attack without worrying about Raikou and Shaddoll Squamata, which will give you more peace of mind when attacking face-down monsters
Colossal Dreadmaw deals what would be lethal damage to its blocker, which is 1 damage
That opponent is chosen as part of that additional cost