The Amber and Amethyst deck is probably the easiest to master, while the Ruby and Emerald deck is the trickiest of the three to understand, although its probably the most flexible and adaptable of the three decks
However, the Kyurem card from Night Wanderers features new art and an updated moveset
This creates an Incubator token with X +1/+1 counters on it, which can then be turned into a creature for only two mana, and can potentially be a win condition all on its own
Choose from 4 different decks, featuring all new art from The Lord of the Rings: Tales of Middle-earth and each containing 20 never-before-seen Commander cards
In the super-early days, decks of nothing but R&D tried numerous times to recapture the feel of Plague Rats, usually choosing to make the creatures bigger based on all your Rats
Copying spells inherently has one of the highest ceilings a deck can have, however there will be games in which your instant won't do much even if it is doubled up