Academy Researchers + Fool's Demise + Phyrexian Altar

Academy Researchers

Fool's Demise

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Academy Researchers
2. When Academy Researchers dies, Fool's Demise first and second abilities trigger.
3. Resolve the second Fool's Demise trigger, returning it from your graveyard to your hand.
4. Resolve the first Fool's Demise trigger, returning Academy Researchers from your graveyard to the battlefield.
5. When Academy Researchers enters, it triggers, putting Fool's Demise onto the battlefield from your hand attached to Academy Researchers.
6. Repeat.