Dualcaster Mage + Thunderous Debut + Mortuary + Altar of Dementia

Prerequisites

• You control at least one additional artifact, enchantment and/or token.

Steps

1. 1Cast Thunderous Debut by paying and sacrificing an artifact, enchantment or token.
2. 2Holding priority, cast Dualcaster Mage by paying .
3. 3When Dualcaster Mage enters the battlefield, it triggers, copying Thunderous Debut.
4. 4Activate Altar of Dementia by sacrificing Dualcaster Mage.
5. 5When Dualcaster Mage dies, Mortuary triggers, putting Dualcaster Mage on top of your library from your graveyard.
6. 6Resolve the Altar of Dementia ability, causing target player to mill cards equal to Dualcaster Mage's power.
7. 7Resolve the copy of Thunderous Debut, causing you to look at the top twenty cards of your library and put Dualcaster Mage and up to one other creature card onto the battlefield.
8. 8Repeat from step 3.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite mill
• Infinite self-mill
• Put all creature cards from your library onto the battlefield