With a set covering a wide range of horror tropes, Delirium seems like a great mechanic to bring back to not only fit some of the horror themes, but to provide a fun, grindy mechanic to this set
The player is chosen as the ability resolves
Sphere of Resistance makes all spells cost more, but youre not in a hurry
If you don't control any Dinosaurs at that time, or if the Dinosaurs you control are unusually small, Triumphant Chomp will deal 2 damage
As an unfun card that punishes players that commit to the board and get ahead, the card is banned in EDH since its anything but balanced
Body of Knowledge and the Maro cycle of legendary spirits from Saviors of Kamigawa have power and toughness that rely on the number of cards in your hand, another reason to want a mittful of cardboard