So, if you want some lifegain, I have a "few" suggestions :)

*Martyr of Sands - Definitely good for a quick boost of life. Especially since multi-colored cards count, you could be gaining upwards of 12 life off of this card.

*Congregate - In Commander where at least one person has a swarm of tokens, this could be very useful. Say you're in a 4 player game and everybody has at least 2 monsters. This card would get you 16 life of off that.

Now suppose that someone has pulled off an amazing 30 creature combo. From them alone you would get 60. I would definitely recommend this card.

*Swords to Plowshares - Removal? And lifegain? At instant speed? Need I say more.

*Beacon of Immortality - In Commander, this is already stupid. With your deck and the massive amount of life you can maintain for long periods, it's even stupider. It's even better if you have cards to search it (example: Mystical Tutor)

*Zuran Orb - This card is really good if you are Flooded. May not necessarily be useful for you because you wouldn't have a lot of synergy with dead lands.

*Words of Worship - If you are sitting on everything you need, you can easily exchange that card draw for 5 more life. Also, this works well with Oloro's ability as well. You can still draw while gaining even more life. Or use Words of Worship again to gain 5 life instead of drawing one with Oloro. Lots of use with this one.

*Tendrils of Agony - If you can cast a lot of spells before hand, this one can be interesting. Don't forget that laying down Zuran Orb counts as casting, so you can use this to gain a few life while getting rid of some of your opponent's. This one really depends on how often you can cast things, though. If you like casting one or two bigger things more often than lot of little things, this may not be the card for you.

*Soul Warden - This is a lot like Congregate except it takes advantage of cards as they come, not after they've already got there. It's great because you gain life when your opponents play creatures, too.

*Contemplation - Whether you cast a lot of spells each turn or a few, this card definitely helps as you go.

*Ivory Tower - With all of the card draw potential you have, you can also have life gain potential with this card. It's definitely doesn't hurt, and it can constantly give you life with no extra cost after you throw it down.

*Faith's Fetters - Suppression on an enemy creature while gaining life. Nice.

*Kokusho, the Evening Star - Nice big creature with some life gaining benefits. Either they deal with a 5/5 flyer, or the other players take an instant hit while you gain life. Once again, in a multiplayer game with 4+ people, you can be gaining 15+ life when it dies.

*Exsanguinate - If you are sitting on a decent amount of mana, this can be a hefty hit to your opponents. And, it's even better for you. This is like Kokusho in a sorcery, but it has the potential to deal more.

*Diamond Valley - Not instant gratification for life, but very nice if you aching for another hit. This is really good if you are blocking with a creature that's going to die anyway.

*Luminous Wake - If you enchant a creature your opponent controls with 4 or less attack, it pretty much renders it useless (barring other effects like double strike). If you enchant a creature you control that can't be destroyed in battle for whatever reason, you get 4 life for blocking. You could also use this to your advantage with attacking, but this deck isn't really about dishing out combat damage.

*Invincible Hymn - This card is stupid if you draw it early. In Commander, it's evens stupider. You could draw this on turn 15 and still have the potential to make your life total 84. Now, the downside is that by turn 15 your life is probably in the hundreds. I don't really recommend this card, but I thought it deserved a mention.

*Survival Cache - Life gain and card draw. Plus, you get it again next turn for no extra charge. Right up your alley.

*Honor the Fallen - Not only does this hurt Commanders like Meren of Clan Nel Toth, but you get life out of the deal.

*Venser's Journal - A much, much better version of Ivory Tower, in my opinion. Basically life gain every turn guaranteed.

*Ajani Goldmane - Life gain everywhere. And, he makes a Serra Avatar by the 3rd turn he's out.

*Celestial Mantle - This card can be very broken in Commander. By turn 6, it may be very hard to actually hit a player with an attack. But the payoff is amazing. If the creature also happens to have double strike, you get 4x your life total with a single swipe.

*Sculpting Steel - While not a life gain card itself, it can become one. Imagine this as a copy of Venser's Journal. Then you gain 2 life for each card in your hand.

Whew. I know that was a lot of life gain recommendations, but I thought you would like to see as many as possible to mix into your deck in whatever playstyle suits you best.

JerichoDarkstar thank you for the suggestions! I'm think about adding Marty of sands, congregate, becon of immorality, exsanguinate, invincible hymns, celestial mantle, vanser journel, kokusho and sculpturing steel. What would you get rid of?

Serra Ascendant is a pretty awesome card for commander, especially yours. who wouldn't want a one drop flying killer on the board first turn? I also recommend Vedalken Orrery because it leaves you incredibly responsive, so may as well get a Leyline of Anticipation while you're at it! and I agree with JerichoDarkstar about congregate, especially when someone has a megaton of creature tokens out (something I do well), followed quickly by our mvp Vedalken Orrery to flash in Elesh Norn, Grand Cenobite and really ruin a creature token based deck until they have a way to deal with that. its beautiful, and I hate it, cause i'm usually on the creature token side of things lol another good card to have if you run good reanimation in your deck is Mind Over Matter. if you have good draw advantage and need to get out of a bad situation, simply discard appropriately and stall your opponent out. I run mono blue artifact right now, so I have more expendable cards, but still a great fallback to have in case you need it.

oh and Felidar Sovereign. its pretty rude. flash it in just as its about to go into your turn and watch them scoop!

I currently have a problem with card draw. The flash with elish norn would be amazing. Also when I play at my store we have a point system and I would only get one point for winning the game.BringinIT001

Oloro is one of the only decks I'd suggest running the Exquisite Blood and Sanguine Bond combo. You already have the Bond, so Blood isn't too much more to add. And it's a solid piece by itself, gaining you life not only when you hit someone, but also when two of your opponents smack each other. And again, together they are an instant wincon.

Sydri, Galvanic Genius is amazing if you're using Aetherflux Reservoir. Make it a creature, give it Lifelink, kill everyone.

If you need card draw, I'd suggest both Phyrexian Arena and Rhystic Study. You can afford the 1 life per turn to double your natural draw.

The above-mentioned Felidar Sovereign and Serra Ascendant are absolutely amazing. I'd definitely include them if at all possible.

The last one is pretty pricey, which is probably why it's not in your deck. But on the off chance it simply slipped your attention, you should look into the Archangel of Thune

Definitely add Exquisite Blood to the mix. It can combo with Sanguine Bond and Vizkopa Guildmage. Also some tutor addition would help with mana as you can snag Chromatic Lantern or get the second card for either the bond/blood combo or sydri/resevior combo to finish off the game.

thermalproject I might add more tutor so I can run the combo with the aetherflux, Im gonna take out some lands and add mana rocks what do you think?

You could lose a couple lands but I feel like there are other tweeks that would be better. In my opinion you have a few high cost cards that don't run as well as some other options that require much less mana. Some land adjustment might be a better option for the mana situation. Myriad Landscape would be an easy addition to help for those times when you need multiple of one basic land type and could easily replace Lonely Sandbar just as a for instance.

thermalproject what cards would you take out?

That would depend on what kind of build and what your budget would be.

thermalproject card draw and life gain. And no budget

These are great additions to Oloro, as they synergize well-

Sphinx's Revelation
Alhammarret's Archive
Well of Lost Dreams

Yeah I have the well in my deck and I need the other two. Rustles_floors

If you want card draw Necropotence is one of the best and even better with lifegain, though you may need more colour fixers for the 3 black mana.

Karlov of the Ghost Council is a really cheap beater/removal for the deck, though I would say reduce your creature count a litte for more removal Vindicate Anguished Unmaking Utter End Return to Dust Merciless Eviction are all strong and versatile.

Hatred is a hilarious card and with so many flyers/lifelink will steal games, it sucks if it gets countered but even then it is still funny.

Thatguy795 you are right about the creatures. What would you get rid of?

Windwright Mage Stormscape Battlemage Tower Gargoyle are where I would probably start, probably try to reduce your average CMC though that may depend on the speed of your meta.

To save space No Life? Guess I'll take yours. has most of the suggestions I'd give for possible replacements. My own Oloro deck is creatureless Oloro - So I heard you like creatures? and is just there to annoy my playgroup... if you wanted to take that route.

Thatguy795 I'd say it moves at a medium pace. And I wanna cut it down to maybe 25 creatures.