Infuse with Vitality + Dualcaster Mage + Phantom Train

Infuse with Vitality

Dualcaster Mage

Phantom Train

How it works

1. Cast Infuse with Vitality by paying its mana cost.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, copying Infuse with Vitality, with the copy targeting Dualcaster Mage.
4. Resolve the copy of Infuse with Vitality.
5. Holding priority, activate Phantom Train by sacrificing Dualcaster Mage.
6. When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield.
7. Repeat from step 3.
8. Resolve all Phantom Train abilities from step 5.

This loop turns a simple combat trick into an engine of endless rebirth by leaning on Dualcaster Mage's flash and spell-copying trigger. When you cast Infuse with Vitality and flash in Dualcaster Mage, the Mage copies the spell to target itself, granting a delayed return-to-battlefield trigger along with a nice little 2-life bonus. From there, Phantom Train serves as the sacrificial outlet that feeds on the Mage, letting you continually kill and recur Dualcaster Mage to generate infinite sacrifices, enters-the-battlefield triggers, and lifegain. Every iteration also fuels Phantom Train itself, since sacrificing the Mage allows you to pile infinite +1/+1 counters onto the Train while turning it into an active Spirit creature.