One combo I didn't see mentioned is Draw then Discard effects (or vice versa) such as that provided by Murder of Crows or Greater Good. For example: Sidisi + Greater Good + Dredge + Doubling Season = infinite zombies (in theory). Doubling season can be substituted with a number of cards like Extractor Demon for example, also Greater Good can be substituted with other effects such as Unfulfilled Desires of Compulsion to accomplish this combo as well.
Before I begin I apologize in advance if I break any of the rules as this is my very first post and I only created this account to post about your Rasputin deck.
Myr Battlesphere - Flickered one time unblocked does 20 damage (I call it the poor man's Eldrazi).
Nevermaker - Flickered can set your opponent back turns by controlling their next draw.
Planar Guide - Reactivates all your enter battlefield effects and can lock opponents from attacking.
Rishadan Brigand - I haven't gotten to test this one yet but it seems like it might be fun (and it's a pirate so you can make pirate jokes and talk in a funny pirate voice).
Cloudstone Curio - Allows you to reuse any Enter battlefield effect.
Sunder - Great in mid and late game, it can lock people down to 2 land for the rest of the game.
Capsize - You run infinite mana combos so this would be an excellent addition to return all permanents to hand.
Blue Sun's Zenith - With infinite mana this will draw out an opponent.
Tawnos's Coffin - If you got the money this is a great tool as well, you can use on Rasputin to refresh Dream counters or use it like an Oblivion Ring.
Minion Reflector - Cheats an extra use of Enter Battlefield effects and gives you some free damage when the copy attacks with haste.
I have a Rasputin deck too If you ever want to check it out it is at TappedOut.net (it is not yet finished, which will be obvious when you see the huge list of cards in my Maybe pile)
Before I begin I apologize in advance if I break any of the rules as this is my very first post and I only created this account to post about your Rasputin deck.
Gilded Drake - Combos with any bounce you run to take control of the board e.g. Venser, Shaper Savant.
Myr Battlesphere - Flickered one time unblocked does 20 damage (I call it the poor man's Eldrazi).
Nevermaker - Flickered can set your opponent back turns by controlling their next draw.
Planar Guide - Reactivates all your enter battlefield effects and can lock opponents from attacking.
Rishadan Brigand - I haven't gotten to test this one yet but it seems like it might be fun (and it's a pirate so you can make pirate jokes and talk in a funny pirate voice).
Cloudstone Curio - Allows you to reuse any Enter battlefield effect.
Sunder - Great in mid and late game, it can lock people down to 2 land for the rest of the game.
Capsize - You run infinite mana combos so this would be an excellent addition to return all permanents to hand.
Blue Sun's Zenith - With infinite mana this will draw out an opponent.
Tawnos's Coffin - If you got the money this is a great tool as well, you can use on Rasputin to refresh Dream counters or use it like an Oblivion Ring.
Minion Reflector - Cheats an extra use of Enter Battlefield effects and gives you some free damage when the copy attacks with haste.
I have a Rasputin deck too If you ever want to check it out it is at TappedOut.net (it is not yet finished, which will be obvious when you see the huge list of cards in my Maybe pile)
This is the URL: http://tappedout.net/mtg-decks/rasputin-weaving-your-nightmare/