League of Legends Patch 7.20 is fairly small compared to some of the other ones so far in Season 7, but it includes some changes to Tahm Kench.
His passive, An Acquired Taste, now does more bonus magic damage based on a percentage of his maximum health per stack. Each time Tahm Kench lands a basic attack or his abilities on an enemy champion, it now does 1.25, 1.5, and 1.75 percent of his maximum health as bonus maximum damage per stack at Levels 1, 11, and 16. The maximum damage ceiling of his passive also increased to 3.75, 4.5, and 5.25 percent of his maximum health.
The lock-out of his W, Devour and Regurgitate, has also been decreased, giving players more time to make quick decisions. After devouring a minion, his lock-out until his regurgitation has been decreased from two seconds to one. The lock-out for Devour after using his ultimate, Abyssal Voyage, is no longer locked out either, making him able to use the ability after he finishes his teleport.
Tahm Kench has been neglected in recent patches despite being a popular support pick last season. But in a meta in which utility supports have so much priority with Ardent Censer and Ancient Coin, tank supports like Tahm Kench are rather unpopular.
Other champion changes
Brand finally received his mana refund. When he kills an enemy marked by his passive — which is triggered by using an ability on them — Brand now gets 6, 8, 10, 12, 14, 16, and 18 mana at Levels 1, 3, 6, 9, 12, 15, and 18. Keep in mind, if he kills enemies with a single ability, he will not get any mana back.
The previously tested buffs to Graves have been applied. He now has an increased health regeneration of 8 per five seconds, and his Q does 1.0 bonus attack damage instead of 0.8.
Karma will be able to use her ultimate a lot more often now. Every time she hits an enemy champion with her basic attacks or abilities, it will now reduce the cooldown timer of her ability by 2, 2,5, and 3 seconds.
Ornn, the game’s most buffable champion, received some more. His W — which was tested before — now does damage equal to 12, 14, 16, 18, and 20 percent of the enemy’s maximum health. The previously undocumented changes are to his E and ultimate. When he collides with terrain with his E, the area in which he deals damage and knocks enemies up is increased to 150 range, and there is no cast time for the second cast of his with his ultimate.