Why is Sliver Overlord in there as your commander and as a creature?

Scorpios, I'll have to count my deck. I may only have 99 cards and Tapped out wouldn't let me post until there were 100 listed, hince Overlord getting a double post. Thanks for the catch!

Sir_Millzalot Welcome.

Also, why do you run all 10 guildgates and have Maze's End? There are many better cards out there, and Maze's End is a finicky win condition at best, when everyone runs cards like Strip Mine or Ghost Quarter. Instead, you should swap out the guildgates for more pentacolor lands like City of Brass and Ancient Ziggurat. Another issue I see are enchantments. Why run enchant creature cards, where Slivers focus around anthem-type effects? You can swap out the enchantments for cards like Homing Sliver or Demonic Tutor, which'll allow you to tutor for slivers without your commander and get you effects across the board. my last issue is your inclusion of Vraska the Unseen. While a nice plainswalker, she doesn't really fit with slivers. She's nice for removal, but cards like Harsh Mercy can do all that but better. What I would do is move all those cards from your maybeboard onto the mainboard, replacing somewhat useless cards like Zhur-Taa Druid.

I'd also recommend removing all your instants for better cards. For instance, Harrow is nice, but there are somewhat better cards out there like Kodama's Reach or Cultivate. Not of This World is iffy at best, seeing as it can help very few of your slivers until you have cards like Megantic Sliver out, which also would go well in this deck. (To restate what I said earlier, you should keep Call to the Kindred, but remove cards like Gratuitous Violence, Gruul War Chant, Alpha Authority, Madcap Skills, Steel of the Godhead and Unnatural Selection. Those all don't seem to make any sense to me.) Some of your artifacts like Heartstone seem a little pointless. Heartstone only really synergieses with Sliver Overlord, Sliver Queen and Poultice Sliver (which is drastically worse than Crypt Sliver.) Civic Saber is only really good with your pentacolor slivers, otherwise it's useless, and as I said before, doesn't provide that anthem-type effect. Golgari Signet is also an odd choice. Finally, Armed / Dangerous is another odd choice, that may want to be scrapped. I understand if this is only a budget deck or just cards you've thrown together, but if you want to take this deck to the next level, I'd suggest heeding my suggestions. Some cards that'd work well in here are Adaptive Automaton, Belbe's Portal, Door of Destinies, Obelisk of Urd, Patriarch's Bidding, Riptide Replicator, Steely Resolve and Shared Triumph.