Whenever another creature you control enters, you may pay life equal to its power. If you do, put that many +1/+1 counters on it.
Madame Null is a mono-black counters payoff that lets you pay life to double the power of each creature as it enters, snowballing your board into oversized threats. You ramp into beefy creatures, flicker or recur them to re-trigger the doubling, and protect your life total with lifegain so the payments never matter. Win by swinging with enormous, deathtouch-backed bodies or by funneling counters into a single Voltron threat.
Effectively doubles the power of every creature you play, turning fair creatures into game-ending threats fast
Deathtouch on the commander makes attacking and blocking miserable for opponents
Mono-black gives deep tutoring, recursion, and card advantage to find and rebuy payoffs
Synergizes with both go-wide token strategies and single-target counter pile-ons
Life payment is real and can be exploited by aggressive or burn-style mono-black mirrors
Token creatures with 0 power gain nothing, so the payoff is selective
Relies on creatures actually entering, so heavy board wipes set you back hard
Counters can be removed or the creatures killed before counters pay off, and the ability does nothing for instant-speed interaction
Legendary Creature — Demon Advisor
