Its going to take some work, but he goes into great detail on the strategy here
The -3 lets you destroy a target creature, and finally, the -6 gives you an emblem that states "whenever you gain life, target opponent loses that much life." Given that this card only costs four mana to cas t, it, like most of Witherbloom, is quite finely balanced and should see plenty of play across Standard and Commander
Right now, players are really hyped about Mufasas competitive viability
Design Sensibly Learning to design in a sensible, straightforward way will help you get far
Carnage in Commander When it comes to Commander, a few shells will shine better than others with Carnage, Crimson Chaos