I initially tried to have ways in all the colors to give them some ability to cheat Eldrazi (or other fat stuff) into play but it ended up being a clunky design that took much space so I've since then narrowed my selection.

White: None really, unless you go off the deep end of jank and play top manipulation, Mastery of the Unseen and then blink the manifested Emrakul. So yea, none. Windbrisk Heights could be reasonable to some but I'm already heavy on lands and focused on fixing so it's not an option for me.

Blue: Show and Tell. Also Bribery, but that doesn't play to your own deck.

Black: You can have instant speed reanimation and combine this with discard to cheat Eldrazi into play despite them wanting to be shuffled. Goryo's Vengeance, Makeshift Mannequin and Necromancy are alternatives but you're getting awfully dedicated if you opt for the first two. I have just Necromancy.

Red: Through the Breach and Sneak Attack. That's plenty.

Green: Various ways. My favorite so far has been Channel Genesis Hydra X=15, digging up Emrakul. Pattern of Rebirth gets it done and obviously green is filled with traditional ramp, in both spells and creatures. Tooth and Nail, See the Unwritten.

Multicolor: Mirari's Wake in Selesnya, Jhoira of the Ghitu in Izzet.

Artifacts: Colorless ramp package (Monoliths, Gilded Lotus, Dynamo, Powerstone, Signets) and a Quicksilver Amulet.

Even if this appears like a lot of ways, they're very "general" aside from a few exceptions. I try to make my design so that no one card fits to one deck design only and none of these cards require the Eldrazi as their target even if the Eldrazi work nicely with all the alternatives.