Its not actually eating your friends, but it sort of works like that
Necroduality on nontoken Zombie ETB, creates a token thats a copy of that creature, so it doubles our nontoken Zombies which is insane for a Zombie Tribal deck
Some stamped Eeveelutions have been selling for double their usual price, while others are currently still going for around five times their expected singles price
Getting to five artifacts and creatures can be a task if your opponents are on to you, but once you unlock the Barracks of the Thousand, your living weapons, Ancestral Blades, Citizen's Crowbars, and Treasures become incredibly strong
Looking at cards like Syr Konrad the Grim sitting in the uncommon slot when we have Linden, Steadfast Queen as part of a cycle in White is just bizarre
This goes infinite in a billion ways, but its just hard to handle a large flying creature that benefits from every other large flying creature you cast coming into play