Activate Heartless Hidetsugu by tapping it, dealing an amount of damage to each opponent equal to their life total, and dealing damage to you equal to half your life total, rounded down.
Each opponent who had an even life total loses the game due to having 0 or less life. Each opponent who had an odd life total will have 1 life remaining.

Near-infinite damage to all players

Heartless Hidetsugu

Fiendish Duo

Declare Delina as an attacker.
Delina triggers, creating at least one token copy of Fiendish Duo that is tapped and attacking.
Deal combat damage with Delina, dealing at least twelve commander damage to an opponent.
Kediss triggers, causing Delina to deal at least forty-eight damage to each other opponent.

Combos with "Fiendish Duo"