
As long as Kosei is enchanted, equipped, and has a counter on it, Kosei has "Whenever Kosei deals combat damage to an opponent, you draw that many cards and Kosei deals that much damage to each other opponent."
Kosei, Penitent Warlord has 2 printings, first in Neon Dynasty Commander (2022). EDHREC ranks it #15,123 among Commander cards. It appears most in Chishiro, the Shattered Blade decks (1,585 on EDHREC). 1 public deck on TCG runs it.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.