Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phyrexian Altar + Old-Growth Educator

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

Phyrexian Altar

Old-Growth Educator

How it works

1. Activate Phyrexian Altar by sacrificing Old-Growth Educator.
2. When Old-Growth Educator dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Old-Growth Educator enters, it triggers, putting two +1/+1 counters on it.
4. Repeat.

This clever loop utilizes Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight's night face, Isilu, to grant persist to your other nontoken creatures, allowing Old-Growth Educator to continuously return to the battlefield after being sacrificed to Phyrexian Altar. Thanks to the lifelink provided by Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Old-Growth Educator naturally satisfies its infusion condition upon entering, placing two +1/+1 counters on itself that immediately cancel out its -1/-1 counter. This elegant neutralization of persist's drawback allows you to sacrifice Old-Growth Educator indefinitely, generating an endless supply of colored mana and boundless triggers.