Rules 11/10/20 Counters put on Xenagos remain on it while its not a creature, even if they have no effect
All of Magics demon commanders are here, ready for your bloody signature on their accursed contracts
If your goal is to waste as little mana as possible, laying a tapped land is effectively a way to spend (or invest) one mana on whatever turn is most convenient
If the biggest drawbacks you cite are that it doesn't hit all cards in a graveyard and the second activated ability costs too much, I'll take those drawbacks when I have the chance to recur the artifact with a Myr Retriever
Weakness: Lightning (x2) Resistance: None Retreat: 4 Chinchou - Lightning - HP60 Basic Pokemon [C] Illuminate: Look at the top card of your deck
Each deck contains 1 ready-to-play deck of 99 Magic: The Gathering cards, 1 legendary foil commander card, 10 tokens, 1 deck box (can hold 100 sleeved cards), and 1 life tracker