Abbey Road

Cumulative upkeep: pay 2 life.
During each combat phase, untap all creatures
you control and put a +1/+1 counter on each
creature with an even mana cost (0 is even).
Then, for each enchantment or artifact you
control, double the counters on each creature you control with an odd mana cost.
At your end step, creatures with power less than
4 are put on the bottom of their owners library.