you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way. We already wrote about this floating eyeball in-depth, but the long and short of it is that you can always choose the best player for whatever you need, and thats the kind of flexibility you really want in any deck, let alone in your commander
2: Target player mills three cards
Slightly harder to pull than commons
Basically, all you need to do is have Mewtwo EX on the Active Spot, and as soon as you get Gardevoir on the Bench, it transfers one free Psychic Energy to it every turn courtesy of its Psy Shadow Ability
In the early game, you can cash in a token to remove your opponent's best thing and then later start growing your tokens with the equipment, which only costs a single mana to equip