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The Cauldron exiles a key creature from a graveyard, usually Vivi Ornitier, and grants its activated abilities to all of your creatures with +1/+1 counters

Unfortunately, even reanimating this doesnt make that ability worth 5 mana in Commander so I really hope no one has paid 10 for it

Sure, it helps everyone at the table, but it really helps you the most

For my money, this is a nice payoff with some big upside, but having the downsides of needing to connect without any built-in evasion plus relying on your opponent picking a good thing for you to reanimate makes this too difficult to use

The combination should work well to showcase ability usage