The Pine-Marsh-Chopper

At the beginning of your end step, if The Pine-
Marsh-Chopper attacked this turn, you may
discard a card. If you do, it deals damage equal to
its toughness to target creature or planeswalker.
Whenever you discard a card, put a +1/+1
counter on The Pine-Marsh-Chopper.
Discard a card: Until end of turn, The Pine-
Marsh-Chopper becomes an artifact creature
and gains haste.