MAGIC: THE GATHERING
: Put a +1/+1 counter on target creature you control.
Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on Simic Ascendancy.
At the beginning of your upkeep, if Simic Ascendancy has twenty or more growth counters on it, you win the game.
Alternate win-cons are fun, and with Proliferate coming back in War of the Spark, there will be plenty of ways of getting the counters you need.