Sideboard

General
This is actually a 3-decks-in-1 modular design. I will show the core of the deck in the decklist and the modular components in the sideboard. This notes section will contain how to fill out the rest of the deck.
NOTE: This is a work in progress. Not all of these cards are owned and not all of them will be used. I will proxy all the unowned cards and decide the optimal list, then pare it down.

Queen (1v1, FFA)
The default mode of the deck. The queen will be more focused on the long game and "comboing out." Because of the lack of tutoring ability, the slivers in this version will be focused on utility. Includes more slivers that require sacrificing, as she can always create tokens to use as sac fodder.

Legion (1v1)
This is going to be the "win fast" version of the deck. Legion grows to enormous proportions quickly and thus will depend more on the cheaper (3 CMC or less) slivers and/or those that grant evasion, power-boosting, and regeneration.

Overlord (FFA)
The most controlling (and dick) version due to the built-in tutoring ability. Also the only one to include non-sliver creatures (Amoeboid Changling and Sliversmith).

Sideboard (all modes)
Coalition Victory -> Conflux/Cruel Ultimatum
Crystalline Sliver -> Opaline Sliver
Door to Nothingness -> ???
Fractured Powerstone -> Darksteel Ingot
Ghostflame Silver -> Konda's Banner
Plague Sliver -> ????
Thespian's Stage -> Transguild Promenade
Vesuva -> Rupture Spire