- . AS Karthus is not that strong as you may thought.
- . I prefer this one, because it helps your teammates to get the kills after . Also you deal a lot of AoE damage, so you can affect more enemies.
- . I take this only beacuse isnt good on Karthus, since all of your abilities are AoE (unless its single target ), AP is also nice.
- . I like this one more than , because you have 3% from the start. You can still take Booty Hunter tho.
- . AP Karthus, remember?
- . It's better than on Karthus, because he doesnt work like Lux or Veigar - oneshot people with 3 abilities. It works great with and, well, every other ability too lol.
- . Helps with farming, and well, 10 MS is not really worth. - . Karthus is not an Assassin, but this mastery gives extra 2% Damage, it helps in lane and duels. Also, if you cast while being alone it will deal extra damage to all champions too. is for pussies :^) - . MORE PERCENT DAMAGE INCREASE PLZ. Helps killing people with . - . My own prefernce. I like gold, also is useless for Karthus most of the time, since you get kills/assists after your death. Not always, but still. is cheese, but wait, its another damage boost :^)
Pretty standard, D. Ring and pots. Gives all you need early.
- usually a first buy, better as soon as possible. Gives a lot of HP, Mana, AP and sustain. The best item for Karthus I guess.
- classic boots for Karthus, dont buy anything else. Buy them after the first item.
- first item against Zed/Kayn/Talon/Yasuo. If you are behind, dont buy RoA after this, go for .
- good second item if enemies started buying MR items.
- buy this after 1-2 finished items. This will give you 50 MPen with boots and runes (if you are using first page of course). Don't finish it unless you need passive against fat tanks or all items are done. - go for Deathcap if you are ahead and dont need % Magic Pen from . It will increase you damage a lot.
- lets talk about this one. It's a great late-game item, combined with RoA it gives a lot of mana and AP, but if you buy early it will delay your damage a bit. Do it on your own risk.
- its a good item when you already have some damage and penetration in your kit, all stats from it are really nice, but many players dont like Morello. I like it. Thats why this book is here. There is nothing wrong with some CDR on Karthus, also it gives 100 Ap and 400 Mana, what else do you need?
- nerfed, but still viable. Buy it with , to double the damage, bring more CC and survive in fights longer.
- it is good against CC chhampions such as Lux/Veigar, also it has nice MR stats.
- weird item for Karthus, but it can work if you want to burst squishes with one . Sell boots and buy it in late game, 100 AP is 100 AP.
- buy this one late game if you have 500g, AP and true damage.
- decent item against heavy AP teams OR if you suck in lane. It gives MR and RoA passive + an aura. Helps in teamfights and duels, but gives no AP and your ult will deal less damage on targets far away from the aura.