Hey ya I'm BullRed07 and looking other MobaFire builds i decided to make this quick Ivern guide.
Since I've been testing some builds for a while now aswell as playing jungle and support (ofc with smite) I took some conclusions and want to share them to you :)

As I've been playing this champ, I've seen he is a great support but a really great ganker aswell so we'll play him jungle.
He's squishy tho and it's very important to stay in the fight as long as we can due tu our insane utility, so better to pick up resistances and cdr.
Strenght of the ages help us get a little bit tanky during the mid game. Our passive makes us lose health and mana, but when we reach 300 stacks Strength of the Ages will heal us automatically. Great mastery to take.
Ivern has great AP scalings and dmg, so getting AP and MagicPen will be really useful.
And has great pushing capabilities with Banner of Command and Zz'Rot Portal.

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ALWAYS RUN THIS PATH

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Apply passive to gromp -> blue -> smite red -> gank top/mid or bot/mid depending on the side of the map. Lvl 2 we want to take e so we have that really nice slow for ganking.
Mark camps that were left -> take blue -> take gromp -> gank bot/mid or top/mid depending on the side of the map.
First back we'll want to take Boots and Aether Wisp to have some movementspeed to keep ganking.

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OBJECTIVES

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Here you should be focusing on objectives and keeping one lane pushed. You should have Ionian Boots of Lucidity, your jungler item and maybe a Fiendish Codex or an upgrade. So you're sitting with 20% cdr and some resistances.
Always try to get Rift Herald. The best moment to take it is after a gank in the top lane when you kill the laner or you force him out. Try to let it to the mid or top laner.
Control the dragons. The best moment is aswell after a gank bot, (if bot is ss or went to base you can do it too, but always check enemy mid laner is busy and he can't come to contest.
Play agressively since you'll have some lvls on Triggerseed and you can resist some hits when you summon Daisy!.

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TEAMFIGHTS

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You're an engager and a peeler. Try to hit Q Rootcaller to an enemy targer such as the ap or ad carry and then proceed to peel for your carry. You can use the shield either to save an ally or to a forntliner who is about to engage for the strong slow and the damage.
Don't spam bushes, they're really useful for denying enemy vision, use them well.

Things get a little complicated here. Now you will have full (or almost full build).
Before taking an objective make sure you have a zz rot in a lane and one boosted minion in another lane (so they have to send someone to depush).
You're great at picking targets out of position so if you're taking an objective always look back when they're trying to context and throw an unexpect Q to a carry. You can make a gamewinning engage with that.
If they are willing to go hame (let's say they have a Sejuani or Malphite summon Daisy! before it's too late. When you see they wnat to engage, use it. Maybe you will have to use Zhonya's Hourglass at some point, remember Daisy! still attacks when you're on stasis.
Take the same tips as the iv. Mid game teamfights.