Ringmaster added to Captain’s Mode, Kezu — not

In the new patch 7.38, Valve made significant changes to the balance of Dota 2. The developers added Ringmaster to Captain’s Mode, making the hero available for professional matches.

Ringmaster possesses a unique souvenir mechanic that provides additional abilities. His basic aspect, Carny Classics, includes the following souvenirs:

Funhouse Mirror — creates an illusion of the hero that lasts for 18 seconds. The illusion receives 300% damage and deals 28% of the owner's damage.
Strongman Tonic — temporarily increases the strength of the selected allied hero by 5 + 1.5 per Ringmaster level. The maximum effect lasts for 4 seconds, then gradually reduces and vanishes after 8 seconds.
Whoopee Cushion — propels the hero forward by 400 units, leaving behind a cloud with a radius of 200, slowing enemies by 30% for 3 seconds.
The alternative aspect, Sideshow Secrets, offers other souvenirs:

Crystal Ball — allows scanning of the area, revealing invisible enemies and providing vision of the area.
Unicycle — summons a unicycle that increases the hero's movement speed and allows passage through creatures.
Weighted Pie — knocks back an enemy, limits their vision, and instantly kills any non-ancient creep.

Although the hero Kezu has also received two aspects, he has not yet been added to Captain’s Mode.

Kezu's Aspects

Flutter — Switch Discipline: Kezu deals 12% more damage with the first attack or ability after switching to the katana and gains +12% movement speed for 2 seconds after switching to the sai.
Shadowhawk — Shodo Sai: Activating the mark from Shodo Sai from invisibility deals 50% more critical damage. When Kezu activates the mark, the cooldown time for Shodo Sai and Kazurai Katana is reduced by 20/30/40/50%.

Ringmaster appeared in Dota 2 in August 2024, and Kez was released in November. More details on other changes in patch 7.38 can be found by following the link.