Invoke Prejudice Against Other Colors of Creatures Invoke Prejudice is a Blue Enchantment that increases the casting cost of your opponents creature spells by X if its color doesnt match the color of any of your creatures in play (X is the casting cost of the creature itself.) In other words, this essentially doubles the casting cost of your opponents creature spells if they dont match the colors of the creatures you control
Some cards actually do this to great effect
Once a card is graded, its sealed in a special protective case, often called a "slab." This slab not only preserves the card's condition but also displays a label with its unique certification number and the all-important grade
Julius Jumblemorph as a two-color commander (green-white), but because host and augment cards exist in all five colors, players wanted a five-color option
Pay a bunch of mana to attack me (the non-threat), or attack the real threat for free
So the fundamentals are strong, and more importantly they're fun