Dark Leo & Shredder + Warlock Class Combo

Warlock Class on the battlefield (Warlock Class is level 3 on the battlefield).

Dark Leo & Shredder in hand or on the battlefield or in the command zone.

An opponent cannot block Dark Leo & Shredder if it's on the battlefield, or another creature you control otherwise. Dark Leo & Shredder doesn't have summoning sickness if it's on the battlefield. You control at least four Ninjas.

plus commander tax if applicable if Dark Leo & Shredder isn't on the battlefield available

Declare Dark Leo & Shredder as an attacker if it's on the battlefield, or another creature you control otherwise.

If Dark Leo & Shredder isn't on the battlefield, when the declared creature is unblocked, cast Dark Leo & Shredder either from your hand or from the command zone for its sneak cost by paying plus commander tax if applicable and returning the unblocked attacker to your hand.

Deal combat damage using Dark Leo & Shredder, triggering its second ability, creating a 1/1 Ninja creature token and causing the opponent to lose half their life total, rounded up.

At the beginning of your end step, Warlock Class triggers, causing the opponent to lose the rest of their life total.

Infinite lifeloss for target opponent