Reality Sapling

At the beginning of your upkeep, put a growth counter on this artifact. At the beginning of your end step, choose an ability equal to the number of growth counters on this artifact. 1+: Put a +1/+1 counter on target creature. 3+: Draw two cards, then discard a card. 5+: Creatures you control get haste until end of turn. 20+: You win the game.