Methronome

While Methronome is in play, all upkeep steps
are skipped. Every creature in play gets:
"{t}Remove one -1/-1 counter from this creature.
Gain 1 mana of any color."
At the start of each player's combat step, put a
-1/-1 counter on every creature that player
controls and untap it.
Every time a -1/-1 counter is put on a creature,
Their controller draws a card, then discards a card.