Ideas for AD version of Rod of Ages

So I had this idea running through my head for a while now. We know that AP champs have 2 mana items which give them pretty decent stats (The Seraph's Embrace and Rod of Ages) and depending on that AP champion ( Kassadin) they usually build one or the other, and sometimes both. So I got to thinking if AD's have the Muramana which is the AD counterpart of the Seraph's, why not a cool AD version of the Rod. In comes this item I like to call Mjolnir's Thunder. It's an AD item which builds off of a Brutalizer and a sapphire crystal. The Item costs 2600g and gives 25 AD, 10% cooldown, 10 armor pen and 400 mana. The Passive would be called Call of Thunder or something cooler if any one suggests a better idea. It would work similar to the rod as it increases AD by 2.5, cooldown bt 1%, and, mana by 20 every minute the Item is in your inventory. Caps at 10 minutes giving the champion 50 ad, 20% cooldown, and 600 mana end game. On paper this item seems OP so any input on toning down the numbers would be appreciated.

Champions who would benefit the most from the item are

Jayce: Hands down one of my favorite characters in League and the one champ I believe would benefit the most from the item. As you know, tear handicaps his early game and delays his eventual power spike, building into this item will give him both the mana and cdr he needs for early laning phase. It also works well with the Muramana passive as well as builds from an early Brutalizer, one of Jayce's core items. Paired with other core items like Muramana, Last Whisper and a Black Cleaver, Jayce will have close to max CDR, great amounts of damage with the Muramana passive and good armor pen. Basically the perfect item for him.

Ezreal: With Blue Ez being the popular build path for the prodigal explorer, this item could be a very useful alternative to the and give him beneficial early game stats as well as some late game power. It solves his early game mana issues as well as give him some decent damage stats and CDR. Works well with most of Ez's items like Triforce, Iceborn Gauntlet, LW, and it can easily replace the rather subpar Essence Reaver.

Talon: An item which I think could prove useful for AD's like Talon who have a weak early phase. Gives armor pen, cooldown, AD, and mana to spam his spells more. It works towards his build path as well considering he builds an early brutalizer for his first item.

Kha'zix: Leagues killer mantis has suffered a lot with the loss of Spirit Stone. Although patch 5.6 might solve his early sustain problems, his mana problems will still be prevalent as the game goes by. The Thunder will solve his mana issues early, give him good CDR to spam his W and Q more frequently, and helps this lovable Voidling clear camps and kill things better. Considering most Kha'zix players build Hydra and tons of armor pent, this item will be a solid pick up for them early when entering late game.

Gangplank: Gangplank arguably has one of the more difficult laning phases in the game but if he stocks up enough gold has proven to be a late game carry. This item would alleviate most of his early game problems which are usually CDR and mana. Critplanks will love it because they can spam q nonstop end game while Tankplank's will benefit from the mana and CDR for their W to cleanse CC. Plus the damage and pen will apply with every Q he fires, Yo ho ho indeed.

Fiora: Did I ever mention how much I love french women? clears throat Back on topic, Fiora is one of the best 1v1 champs in the game but a high cdr ultimate and mana constraints can make dueling difficult. With this item, she can spam her spells more often to keep up with champs with mid to long range spells and auto attacks (Ahri and Caitlyn) and let's her use her ultimate more frequently in those do or die situations. The item also fits with her build paths as Fiora build Youmuu's and Ionians. That's a lot of CDR.

Pros: Solves champion's Mana and CDR issues Good early to late game damage Armor Pen Can help champions reach their power spikes earlier if they need Tear of the Godess. Synergizes well with other AD items

Cons: Requires you to buy early to get the late game benefits a soon as possible May force champs to prioritize this item over other core items. Truly shines late game, not so much early game. Can delay late game power if behind. An expensive item considering early game stats Only works with champs who use mana as a resource.

This is my idea for a new AD mana item, if you want to make any suggestions on how to tone down stats or any other champs who may benefit from the item, let me know in the comments below. Hopefully a Riot employee sees this and it helps give them ideas for future items.