You can also use blue mana to activate its abilities, ensuring this gloopy thing can use whatever powers it steals
Commander players are looking for casual games where they get to show off their favorite decks and cards in a chaotic, splashy environment, and modes like Archenemy are great ways to stay true to that vision while breaking up the monotony of playing the same format all the time
Collector Boosters are a shortcut to the coolest cards in a set, with packs full of Rare cards, shiny foil cards, and special alt-art, alt-frame cards
You could build it up as a Voltron commander and make use of this to commander damage your way to victory, or fill it up with other ways to dish out damage like Roiling Vortex and Guttersnipe
Similarly, Nether Traitor can be brought back from the graveyard for a single black mana whenever any other creature dies (tokens dying counts)