Totally agree with the greater mark of hybrid penetration that Emi-chan mentioned.

Also, Zyra is now the most squishy champion when the game starts, I really think it is worth mentioning a 9/21 masteries for her.

For items, you mention damage and utility, but wheres the defense? Being squishy and with not a lot of mobility can be really troublesome for you Randuin's Omen and Banshee's Veil are totally worth to mention. And I wouldn't recommend getting Rabadon's Deathcap and Void Staff, because they are expensive and don't provide any defense for you, at least Zhonya's Hourglass, Rylai's Crystal Scepter and Liandry's Torment provide a bit of health/armor for you.

Your gameplay section is too short and you show no good information on supporting.

Definitely not a bad guide! Especially since this is your first :) A couple things I'd like to point out though:

greater mark of hybrid penetration I find is really nice on Zyra due to her powerful magic damage abilities, as well as long autoattack range. Having the extra damage on AAs makes your poke even stronger because you can't spam her abilities 24/7.

I personally would never get Rabadon's Deathcap on a support, second APC or not. It's ridiculously expensive and offers no utility for yourself or the rest of the team. Since you are the support, 3 item slots are already taken by Sightstone, your choice of boots, and most likely Frost Queen's Claim, which only gives 50 AP. That means (including Deathcap) you only have another 2 item slots in which you could potentially build AP. This is not nearly as gold efficient as with the actual APC, since they have 4 free item slots (again, including Deathcap and boots).

For your item section, don't use the code: [items=http://www.mobafire.com/league-of-legends/item-purchase-planner#&item=160-152-153-114-155]. Instead, take out the url and use [items=160-152-153-114-155]. That'll take away the 5 empty boxes in the beginning :)


For your matchups section, you could potentially use some colors to make it easier to read. Like, if it's a Great synergy, you could make it a bright green. If it's a bad synergy, you could make it a red.

Great ashe synergy You have great CC and poke, so abuse it. At level 6 the kill potential with the jungler help is 100% if you both land the CC. Your best part of game is the late game, so try to get as many objectives as possible.

Great caitlyn synergy Your range and poke make you have a great laning phase, making a good transition to late game.

Bad corki synergy Not the best lane partener, but you can play a poke lane, even though Corki is better with an all-in support.

Good draven synergy Play safe until he gets a BF Sword, then land your CC and Draven's damage will do the rest.

Good ezreal synergy Poke them pre-6 and then you can force all-ins with your ultimates. You don't have to take care of him that much, his E helps him reposition quickly.

Medium Graves synergy Even though his all-in potenstial is great, he can also poke with his Q. Abuse his level 6 damage and force a fight.

Finally, I think you could be a lot more in-depth. Most of your explanations are simple, one line statements. For example, you say that Mobility Boots is another potential choice. Why? Under what circumstances? When are they better than getting the regular Sorcerer's Shoes? It may seem obvious to you, a diamond player, but to someone new to the game, they'll have no idea. Expand by saying something like: "Boots of Mobility are useful because they allow you to roam and ward quickly. This will reduce the amount of time you are away from your ADC, as well as allow you to soak up more experience because you'll be in lane more often. In addition, you can roam to other lanes, applying more map pressure and help your teammates out by helping them snowball." Stuff like that really makes your guide shine :)

Edit: You should turn on comment to vote. It'll chase away any potential trolls who downvote your guide for no reason at all.