Whenever another creature you control enters, you gain 1 life. If it's a Spider, put a +1/+1 counter on it.
Aunt May is a mono-white creature-flood engine that gains you life and grows your Spiders every time a creature enters. You curve out with cheap creatures and token-makers, leverage lifegain payoffs and go-wide anthems, and either build a wide Spider/Citizen board or convert mass lifegain into a finisher. Early turns establish board presence; mid-game you flood with tokens and counters; late-game you alpha strike or combo off lifegain triggers.
Cheap one-mana commander that comes down early and starts generating value immediately
Strong synergy with token generators and blink effects for repeated ETB triggers
Built-in lifegain keeps you alive against aggro and fuels white lifegain payoffs
Spider tribal counters make a focused Spider build resilient and reach-heavy
Mono-white means limited card draw and ramp compared to other colors
Effects are incremental and low-impact without payoffs—lifegain alone doesn't win
Board wipes are devastating since the deck commits many creatures
Spider tribal lacks deep, powerful support compared to other tribes