While Karakas has no place in EDH, it is kind of funny that the prevalence of planeswalker commanders has reduced its utility somewhat
For example, if two creatures you control with lifelink deal combat damage at the same time, Sanguine Bonds ability will trigger twice and you may choose a different opponent for each trigger
Alternatively, you can make the life swap itself lethal: by running cards prevent you from losing for having less than 1 life, like Phyrexian Unlife or Platinum Angel, you can lower your life total to 0 and swap totals with your opponents, immediately killing them
Once its ability is granted by the Cauldron, your entire board becomes a collection of powerful mana producers
How much better is he than what weve had before
Catching Some ZZZs Zzzyxas's Abyss was playing in similar space with First Come, First Served, but instead of caring about collector's numbers, it cared about alphabetization of the card title