With how big the mana costs can be with some Eldrazi, any shortcut is helpful
Learn the value of cards youre interested in, set a max price in your head, and never exceed it
The next obvious twist is to create Lord enchantments that allow the person who plays the spell to choose which creature type they want to affect: The reason the customizable Lord enchantments are so popular with the designers is that they fit into numerous race decks
After all, you get no built-in protection aside from your ultimate, and instead what you're mainly working with is a bit of card draw and ramp
Rhystic Study is a Game Changer
New Phyrexia brought Karn Liberated, which was the first colorless planeswalker, requiring only generic mana to cast