Dualcaster Mage + Carrion Feeder + Lively Dirge

Prerequisites

• There's a creature card in your graveyard with mana value 4 or less.

Steps

1. 1Cast Lively Dirge by paying plus an additional to select its second mode, targeting a card in your graveyard.
2. 2Holding priority, cast Dualcaster Mage by paying its mana cost.
3. 3When Dualcaster Mage enters, it triggers, targeting Lively Dirge.
4. 4Holding priority, activate Carrion Feeder by sacrificing Dualcaster Mage.
5. 5Resolve the Dualcaster Mage trigger, copying Lively Dirge
6. 6Resolve the Lively Dirge copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. 7Repeat from step 3.

Effects

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers