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It scales with the game nicely and gets around Indestructible, which grows more common with each new set

You have to have a deck of 99 cards plus your commander

Result: Infinite enters/death/sacrifice triggers, infinite leaves the graveyard triggers

Reaching Ultimate is actually very consistent with them depending on your build

Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Halo Fountain: Untapping creatures is part of the cost of all of Halo Fountain's abilities

Hell, maybe even have Replicators with Song of Freyalise, which would then just double the number of Replicators every time you cast a spell