By paying 4, you can roll a 6-sided die plus an additional 6-sided die for every Mana from Treasures you spend to activate this ability
In some Weenie builds it may be worth a try, things would keep dying and just bringing them back for a nominal price, even one at a time, sounds promising
Lets go over using a companion in your commander deck in Magic the Gathering

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Let's look at Grixis Control
Vanellope von Schweetz - Sugar Rush Princess isn't a Legendary card, but it can still be highly useful in the right deck