Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Mindless Automaton + Phantom Train

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Mindless Automaton

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Mindless Automaton.
2. When Mindless Automaton dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
3. Resolve the Phantom Train ability.
4. Repeat.

This clever loop revolves around the dual nature of Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, whose nighttime face grants persist to your other nontoken creatures. When you feed Mindless Automaton to Phantom Train as a sacrifice cost, the Automaton's death triggers Isilu's newly-bestowed persist, bringing it right back to the battlefield to be sacrificed all over again. Phantom Train gleefully accepts these repeated offerings, converting each sacrifice into a growing stack of +1/+1 counters while transforming itself into an active Spirit creature.