Looks pretty good, but Sky Hussar is weak (outside the Kiki-Jiki combo), and Meloku doesn't fit into an aggro deck like this one. I'd add some more Remands/Spell Snares, and maybe some Mistral Chargers.
Five-color sliver tends to be inferior to 3-color in my opinion, since then you won't have to worry about your mana as much. I have a couple sliver decks, one is U/W/B (which uses Crystalline Sliver, Winged Sliver, Esscense Sliver, Toxin Sliver), and a R/G/B one (which uses the Hunter Sliver/Toxin Sliver combo).
Thought of a new land, but I'm not sure at all about the power level.
Undiscovered Forest
Land t, remove a Discovery counter from target creature you control: Add 2 mana of any color to your mana pool. t: Put a Discovery counter on target creature.
Mainly what I do is just speed through the Dark and Fuedal Ages without really doing anything (other than getting a reasonable economy going), then during the Castle Age I build a few Town Centers and churn out a ton of citizens, then start to build a military mainly consisting of Chu Ko Nus, Paladins, and Trebuchets.
Guardian of the Underworld and Guardian of the Heavens are both way too good, they should cost at least 5. And why is Rage different on GotU and Girel?
4.5/5
Undiscovered Forest
Land
t, remove a Discovery counter from target creature you control: Add 2 mana of any color to your mana pool.
t: Put a Discovery counter on target creature.
Heh, thanks. I didn't even notice until I saw the thread today.
I just got MTGO, but I have no idea what to do. Could any of you more computer-friendly types help me out?
I like the title, btw
Really nice banner though.