When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker
This effect only triggers at the end of the turn, which means that your opponent has an opportunity to remove it if they realize that the additional life loss will end up killing them.
*Buy Wilhelt, the Rotcleaver cards on TCGPlayer or eBay *Buy Wilhelt, the Rotcleaver commander decks on eBay The Ur-Dragon Lets be honest, plenty of us were lured into this game by dragons, and The Ur-Dragon is the ultimate payoff
Another legendary land, Tolarian Academy can tap to add one blue mana for each artifact you control
7 Ivy, Gleeful Spellthief Double The Spells Another Simic commander to try, Ivy, Gleeful Spellthief is a truly unique commander that can cause a lot of problems for your opponents
One that I think could make an impact in Commander more broadly