We've got loads of cards spiking thanks to the ludicrous Discover keyword, as well as Merfolk that can counter Cascade, and a possible Discover hate card that's done nothing to stop the rampage of this new ability keyword
I briefly mentioned a graveyard themed Emrakul build but at least you don't need to go outside the main colours for that
There are plenty of ways to get even more out of a card like PuPu UFO, especially with abilities that untap a card, allowing you to triple the amount of lands you can play in a single turn for devastating effects
Because he was taught to master his emotions, he is rather calm, reserved, and quite humble
Sure, that might be a stretch, but its EDH, its meant to be a little janky