Pendulum of Moods

At the beginning of your upkeep, if there are an
even number of cards in your hand, creatures you control get +2/+0 and have haste until your
next turn. If there are an odd number of cards
in your hand, creatures you control get -0/-2 and
lose all abilities until your next turn
Whenever you draw a card, you may discard a card. Whenever you discard a card, you may draw a card.