Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite -1/-1 counters, Infinite +1/+1 counters on a creature
Activate Phantom Train by sacrificing Soulstinger.
When Soulstinger dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Soulstinger enters the battlefield, it triggers, putting a -1/-1 counter on it.
Resolve the Phantom Train ability
Repeat.
Component Cards
How It Works
Activate Phantom Train by sacrificing Soulstinger.
When Soulstinger dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Soulstinger enters the battlefield, it triggers, putting a -1/-1 counter on it.
Resolve the Phantom Train ability
Repeat.