Karthus·Support Build

Most Popular

If you want to use the most popular Karthus Support build, you should take Exhaust and Flash as your Summoner Spells. For runes, you should pick Dark Harvest as your keystone, followed by Cheap Shot, Eyeball Collection and Treasure Hunter in the primary tree, as well as Presence of Mind and Coup de Grace in the secondary tree. For rune shards, you want Adaptive Force in offense, Adaptive Force in flex and Health Scaling in defense, though it depends on the matchup. Finally, for your items, you should build Zaz'Zak's Realmspike as your first item, followed by Sorcerer's Shoes and Blackfire Torch. For your last 3 items, you should build Liandry's Torment, Shadowflame and finish with Zhonya's Hourglass. For the skill order, you want to stick with Q - E - W. Right now, this build has 47.8% winrate over 161 matches played.

Optional

Your second option for Karthus Support build would be to take Exhaust and Flash as your Summoner Spells. The runes that this build takes advantage of are Dark Harvest as your keystone, Cheap Shot, Eyeball Collection and Ultimate Hunter in the primary tree, and Gathering Storm with Transcendence in the secondary tree. The shards used in this build are Adaptive Force in offense, Adaptive Force in flex and Health Scaling in defense. The items for the build are Zaz'Zak's Realmspike, which you should build first, followed by Sorcerer's Shoes as your second item and Malignance as your third item. The rest of the items in order are Liandry's Torment, Shadowflame and Zhonya's Hourglass. The skill order for this build is Q - W - E. In the current patch, this build has a 47.4% win rate over 116 matches.

Situational Karthus Runes and Items

Depending on the context of your game, your matchup, and enemy champions, you might want to consider building some situational items or take specific runes. Carefully examine your team, enemy team, game state , and your matchup to plan your Karthus build accordingly! For example, when it comes to rune shards, you might want to take either Armor or Magic Resist, depending on which champion you are about to lane against.