These effects are scattered throughout red and black, with notable variations including Mayhem Devil (which works really well with Treasure), Ninja Teen (its nice since it survives most board wipes), and Vein Ripper (the biggest variant, both in creature size and damage dealt)
Finally, when scrolling through the card images on Lorcania.com, I ended up having certain colors and designs that I liked more than others, and I abandoned very quickly the idea that I needed to treat each color of ink equitably
There are Deck Missions and play against the computer if youre looking for something a little more low-key and Rental Decks you can use
It is a 3 cost blue enchantment that allows you to draw a card each time an opponent casts a spell, unless they pay 1 mana to stop you doing so
I can't imagine playing fewer than 4 Preordains in most decks that want it, for example