Her favorite cards are Mirari and Phyrexian Arena, and she loves any and all old border foils
There's lots of ways to make this happen: You haven't provided much in the way of other details about your list, but I'm certain you have some sort of controlling archetypes that can be fueled by the Loam engine
It's actually two cards, that combine to form a single card with the standard M:TG monster, representing you summoning a 99/99 Big Furry Monster that also requires you to pay a frick-ton of black mana, and can only exist if both card sits no the board, because it's such a big furry giant-thing
Last time I was here we looked at the Ruinous Powers precon from Warhammer 40,000, giving you an idea on what the deck plays like straight out of the box
There are plenty of other mass bounce spells in blue, but very few ways to deal with a convoluted board state, especially in as permanent a way as exiling all creatures like Oversimplify does